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Hello All - I'm working through a migration with our technical staff of our SharePoint 2016 sites to SharePoint Online. I utilize quite a few Nintex forms.

 

We have successfully migrated Lists with Nintex forms; however, I'm unable to open the Nintex Editor. I can open the Form itself just fine by selecting "New Item." I receive the below error when I attempt to open the Editor:

 

21307i0E76DADF103256F9.jpg

Error: "An embedded page at formso365.nintex.com says: undefined"

 

Using the Develop Tools, our technical resources provided the below error text. Any help would be greatly appreciated.  

>>

Failed to load resource: the server responded with a status of 404 ()

formso365.nintex.com/services/ResponsiveDesignerServices.svc/GetFormCanvasDataResp:1 Failed to load resource: the server responded with a status of 400 (Bad Request)

Nintex.Forms.SharePoint.min.js?v=5Jevl8YSbUE7ol2TsdYq4nBJ_VYxmROTy29Q8aliKcY1:45133 NF.Infrastructure.Server failed. Unable to parse JSON for server response. responseText: <?xml version="1.0" encoding="utf-8"?>

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd>

<html xmlns=http://www.w3.org/1999/xhtml>

  <head>

    <title>Request Error</title>

    <style>BODY { color: #000000; background-color: white; font-family: Verdana; margin-left: 0px; margin-top: 0px; } #content { margin-left: 30px; font-size: .70em; padding-bottom: 2em; } A:link { color: #336699; font-weight: bold; text-decoration: underline; } A:visited { color: #6699cc; font-weight: bold; text-decoration: underline; } A:active { color: #336699; font-weight: bold; text-decoration: underline; } .heading1 { background-color: #003366; border-bottom: #336699 6px solid; color: #ffffff; font-family: Tahoma; font-size: 26px; font-weight: normal;margin: 0em 0em 10px -20px; padding-bottom: 8px; padding-left: 30px;padding-top: 16px;} pre { font-size:small; background-color: #e5e5cc; padding: 5px; font-family: Courier New; margin-top: 0px; border: 1px #f0f0e0 solid; white-space: pre-wrap; white-space: -pre-wrap; word-wrap: break-word; } table { border-collapse: collapse; border-spacing: 0px; font-family: Verdana;} table th { border-right: 2px white solid; border-bottom: 2px white solid; font-weight: bold; background-color: #cecf9c;} table td { border-right: 2px white solid; border-bottom: 2px white solid; background-color: #e5e5cc;}</style>

  </head>

  <body>

    <div id="content">

      <p class="heading1">Request Error</p>

      <p>The server encountered an error processing the request. The exception message is 'Object reference not set to an instance of an object.'. See server logs for more details. The exception stack trace is: </p>

      <p>   at Nintex.Forms.Responsive.ResponsiveFormConverter.ToPixelPerfect(ResponsiveForm responsiveForm, Form formSettings)

   at Nintex.Forms.SharePoint.Services.ResponsiveDesignerServices.GetFormCanvasDataResp(ResponsiveForm responsiveForm, Form formSettings, String activityType, IList`1 fieldListCollection, String token)

   at SyncInvokeGetFormCanvasDataResp(Object , Objecte] , Objectv] )

   at System.ServiceModel.Dispatcher.SyncMethodInvoker.Invoke(Object instance, Objecto] inputs, ObjectO]&amp; outputs)

   at System.ServiceModel.Dispatcher.DispatchOperationRuntime.InvokeBegin(MessageRpc&amp; rpc)

   at System.ServiceModel.Dispatcher.ImmutableDispatchRuntime.ProcessMessage5(MessageRpc&amp; rpc)

   at System.ServiceModel.Dispatcher.ImmutableDispatchRuntime.ProcessMessage31(MessageRpc&amp; rpc)

   at System.ServiceModel.Dispatcher.MessageRpc.Process(Boolean isOperationContextSet)</p>

    </div>

  </body>

</html>

(anonymous) @ Nintex.Forms.SharePoint.min.js?v=5Jevl8YSbUE7ol2TsdYq4nBJ_VYxmROTy29Q8aliKcY1:45133

c @ jquery-1.10.2.min.js:4

fireWith @ jquery-1.10.2.min.js:4

k @ jquery-1.10.2.min.js:6

r @ jquery-1.10.2.min.js:6

t @ zone.min.js:1

e.invokeTask @ zone.min.js:1

t.runTask @ zone.min.js:1

invoke @ zone.min.js:1

XMLHttpRequest.send (async)

n @ zone.min.js:1

e.scheduleTask @ zone.min.js:1

t.scheduleMacroTask @ zone.min.js:1

(anonymous) @ zone.min.js:1

send @ VM912:3

(anonymous) @ InstrumentHooks.js:102

send @ jquery-1.10.2.min.js:6

ajax @ jquery-1.10.2.min.js:6

(anonymous) @ Nintex.Forms.SharePoint.min.js?v=5Jevl8YSbUE7ol2TsdYq4nBJ_VYxmROTy29Q8aliKcY1:45117

c @ jquery-1.10.2.min.js:4

add @ jquery-1.10.2.min.js:4

self.execute @ Nintex.Forms.SharePoint.min.js?v=5Jevl8YSbUE7ol2TsdYq4nBJ_VYxmROTy29Q8aliKcY1:45112

execute @ Nintex.Forms.SharePoint.min.js?v=5Jevl8YSbUE7ol2TsdYq4nBJ_VYxmROTy29Q8aliKcY1:41021

executePost @ Nintex.Forms.SharePoint.min.js?v=5Jevl8YSbUE7ol2TsdYq4nBJ_VYxmROTy29Q8aliKcY1:41015

ResponsiveFormControls @ Nintex.Forms.SharePoint.min.js?v=5Jevl8YSbUE7ol2TsdYq4nBJ_VYxmROTy29Q8aliKcY1:41053

ResponsiveFormControls @ Nintex.Forms.SharePoint.min.js?v=5Jevl8YSbUE7ol2TsdYq4nBJ_VYxmROTy29Q8aliKcY1:39240

requestResponsiveFormCanvasData @ Nintex.Forms.SharePoint.min.js?v=5Jevl8YSbUE7ol2TsdYq4nBJ_VYxmROTy29Q8aliKcY1:46635

getFormMarkUp @ Nintex.Forms.SharePoint.min.js?v=5Jevl8YSbUE7ol2TsdYq4nBJ_VYxmROTy29Q8aliKcY1:46677

loadFormAfterDelay @ Nintex.Forms.SharePoint.min.js?v=5Jevl8YSbUE7ol2TsdYq4nBJ_VYxmROTy29Q8aliKcY1:46549

loadForm @ Nintex.Forms.SharePoint.min.js?v=5Jevl8YSbUE7ol2TsdYq4nBJ_VYxmROTy29Q8aliKcY1:46521

self.onLoadForm @ Nintex.Forms.SharePoint.min.js?v=5Jevl8YSbUE7ol2TsdYq4nBJ_VYxmROTy29Q8aliKcY1:69071

n.raise @ nCaf.Library.min.js?v=iNIz47k8ykYHRB-L78wHf-7x41ZSCjcooQHrxD5namY1:1

raiseLoadFormInCanvas @ Nintex.Forms.SharePoint.min.js?v=5Jevl8YSbUE7ol2TsdYq4nBJ_VYxmROTy29Q8aliKcY1:43856

loadForm @ Nintex.Forms.SharePoint.min.js?v=5Jevl8YSbUE7ol2TsdYq4nBJ_VYxmROTy29Q8aliKcY1:43919

(anonymous) @ Nintex.Forms.SharePoint.min.js?v=5Jevl8YSbUE7ol2TsdYq4nBJ_VYxmROTy29Q8aliKcY1:44124

c @ jquery-1.10.2.min.js:4

fireWith @ jquery-1.10.2.min.js:4

i.<computed> @ jquery-1.10.2.min.js:4

(anonymous) @ Nintex.Forms.SharePoint.min.js?v=5Jevl8YSbUE7ol2TsdYq4nBJ_VYxmROTy29Q8aliKcY1:45119

c @ jquery-1.10.2.min.js:4

fireWith @ jquery-1.10.2.min.js:4

k @ jquery-1.10.2.min.js:6

r @ jquery-1.10.2.min.js:6

t @ zone.min.js:1

e.invokeTask @ zone.min.js:1

t.runTask @ zone.min.js:1

invoke @ zone.min.js:1

XMLHttpRequest.send (async)

n @ zone.min.js:1

e.scheduleTask @ zone.min.js:1

t.scheduleMacroTask @ zone.min.js:1

(anonymous) @ zone.min.js:1

send @ VM912:3

(anonymous) @ InstrumentHooks.js:102

send @ jquery-1.10.2.min.js:6

ajax @ jquery-1.10.2.min.js:6

(anonymous) @ Nintex.Forms.SharePoint.min.js?v=5Jevl8YSbUE7ol2TsdYq4nBJ_VYxmROTy29Q8aliKcY1:45117

c @ jquery-1.10.2.min.js:4

add @ jquery-1.10.2.min.js:4

self.execute @ Nintex.Forms.SharePoint.min.js?v=5Jevl8YSbUE7ol2TsdYq4nBJ_VYxmROTy29Q8aliKcY1:45112

execute @ Nintex.Forms.SharePoint.min.js?v=5Jevl8YSbUE7ol2TsdYq4nBJ_VYxmROTy29Q8aliKcY1:41021

executePost @ Nintex.Forms.SharePoint.min.js?v=5Jevl8YSbUE7ol2TsdYq4nBJ_VYxmROTy29Q8aliKcY1:41015

ToResponsive @ Nintex.Forms.SharePoint.min.js?v=5Jevl8YSbUE7ol2TsdYq4nBJ_VYxmROTy29Q8aliKcY1:41037

ToResponsive @ Nintex.Forms.SharePoint.min.js?v=5Jevl8YSbUE7ol2TsdYq4nBJ_VYxmROTy29Q8aliKcY1:39224

loadSavedForm @ Nintex.Forms.SharePoint.min.js?v=5Jevl8YSbUE7ol2TsdYq4nBJ_VYxmROTy29Q8aliKcY1:44113

(anonymous) @ Nintex.Forms.SharePoint.min.js?v=5Jevl8YSbUE7ol2TsdYq4nBJ_VYxmROTy29Q8aliKcY1:44061

c @ jquery-1.10.2.min.js:4

fireWith @ jquery-1.10.2.min.js:4

i.<computed> @ jquery-1.10.2.min.js:4

(anonymous) @ Nintex.Forms.SharePoint.min.js?v=5Jevl8YSbUE7ol2TsdYq4nBJ_VYxmROTy29Q8aliKcY1:41427

success @ Nintex.Forms.SharePoint.min.js?v=5Jevl8YSbUE7ol2TsdYq4nBJ_VYxmROTy29Q8aliKcY1:45074

SP.RequestExecutor.internalOnMessage @ sp.requestexecutor.js:2

e.invokeTask @ zone.min.js:1

t.runTask @ zone.min.js:1

invoke @ zone.min.js:1

Show 16 more frames

zone.min.js:1 .Deprecation] Triggering window.alert from cross origin iframes has been deprecated and will be removed in the future.

e.invoke @ zone.min.js:1

t.run @ zone.min.js:1

(anonymous) @ zone.min.js:1

alert @ VM906:3

SupplementDefaultMethod.window.<computed> @ init.js:1

window.alert @ prompt.js:104

(anonymous) @ Nintex.Forms.SharePoint.min.js?v=5Jevl8YSbUE7ol2TsdYq4nBJ_VYxmROTy29Q8aliKcY1:45155

c @ jquery-1.10.2.min.js:4

fireWith @ jquery-1.10.2.min.js:4

k @ jquery-1.10.2.min.js:6

r @ jquery-1.10.2.min.js:6

t @ zone.min.js:1

e.invokeTask @ zone.min.js:1

t.runTask @ zone.min.js:1

invoke @ zone.min.js:1

XMLHttpRequest.send (async)

n @ zone.min.js:1

e.scheduleTask @ zone.min.js:1

t.scheduleMacroTask @ zone.min.js:1

(anonymous) @ zone.min.js:1

send @ VM912:3

(anonymous) @ InstrumentHooks.js:102

send @ jquery-1.10.2.min.js:6

ajax @ jquery-1.10.2.min.js:6

(anonymous) @ Nintex.Forms.SharePoint.min.js?v=5Jevl8YSbUE7ol2TsdYq4nBJ_VYxmROTy29Q8aliKcY1:45117

c @ jquery-1.10.2.min.js:4

add @ jquery-1.10.2.min.js:4

self.execute @ Nintex.Forms.SharePoint.min.js?v=5Jevl8YSbUE7ol2TsdYq4nBJ_VYxmROTy29Q8aliKcY1:45112

execute @ Nintex.Forms.SharePoint.min.js?v=5Jevl8YSbUE7ol2TsdYq4nBJ_VYxmROTy29Q8aliKcY1:41021

executePost @ Nintex.Forms.SharePoint.min.js?v=5Jevl8YSbUE7ol2TsdYq4nBJ_VYxmROTy29Q8aliKcY1:41015

ResponsiveFormControls @ Nintex.Forms.SharePoint.min.js?v=5Jevl8YSbUE7ol2TsdYq4nBJ_VYxmROTy29Q8aliKcY1:41053

ResponsiveFormControls @ Nintex.Forms.SharePoint.min.js?v=5Jevl8YSbUE7ol2TsdYq4nBJ_VYxmROTy29Q8aliKcY1:39240

requestResponsiveFormCanvasData @ Nintex.Forms.SharePoint.min.js?v=5Jevl8YSbUE7ol2TsdYq4nBJ_VYxmROTy29Q8aliKcY1:46635

getFormMarkUp @ Nintex.Forms.SharePoint.min.js?v=5Jevl8YSbUE7ol2TsdYq4nBJ_VYxmROTy29Q8aliKcY1:46677

loadFormAfterDelay @ Nintex.Forms.SharePoint.min.js?v=5Jevl8YSbUE7ol2TsdYq4nBJ_VYxmROTy29Q8aliKcY1:46549

loadForm @ Nintex.Forms.SharePoint.min.js?v=5Jevl8YSbUE7ol2TsdYq4nBJ_VYxmROTy29Q8aliKcY1:46521

self.onLoadForm @ Nintex.Forms.SharePoint.min.js?v=5Jevl8YSbUE7ol2TsdYq4nBJ_VYxmROTy29Q8aliKcY1:69071

n.raise @ nCaf.Library.min.js?v=iNIz47k8ykYHRB-L78wHf-7x41ZSCjcooQHrxD5namY1:1

raiseLoadFormInCanvas @ Nintex.Forms.SharePoint.min.js?v=5Jevl8YSbUE7ol2TsdYq4nBJ_VYxmROTy29Q8aliKcY1:43856

loadForm @ Nintex.Forms.SharePoint.min.js?v=5Jevl8YSbUE7ol2TsdYq4nBJ_VYxmROTy29Q8aliKcY1:43919

(anonymous) @ Nintex.Forms.SharePoint.min.js?v=5Jevl8YSbUE7ol2TsdYq4nBJ_VYxmROTy29Q8aliKcY1:44124

c @ jquery-1.10.2.min.js:4

fireWith @ jquery-1.10.2.min.js:4

i.<computed> @ jquery-1.10.2.min.js:4

(anonymous) @ Nintex.Forms.SharePoint.min.js?v=5Jevl8YSbUE7ol2TsdYq4nBJ_VYxmROTy29Q8aliKcY1:45119

c @ jquery-1.10.2.min.js:4

fireWith @ jquery-1.10.2.min.js:4

k @ jquery-1.10.2.min.js:6

r @ jquery-1.10.2.min.js:6

t @ zone.min.js:1

e.invokeTask @ zone.min.js:1

t.runTask @ zone.min.js:1

invoke @ zone.min.js:1

XMLHttpRequest.send (async)

n @ zone.min.js:1

e.scheduleTask @ zone.min.js:1

t.scheduleMacroTask @ zone.min.js:1

(anonymous) @ zone.min.js:1

send @ VM912:3

(anonymous) @ InstrumentHooks.js:102

send @ jquery-1.10.2.min.js:6

ajax @ jquery-1.10.2.min.js:6

(anonymous) @ Nintex.Forms.SharePoint.min.js?v=5Jevl8YSbUE7ol2TsdYq4nBJ_VYxmROTy29Q8aliKcY1:45117

c @ jquery-1.10.2.min.js:4

add @ jquery-1.10.2.min.js:4

self.execute @ Nintex.Forms.SharePoint.min.js?v=5Jevl8YSbUE7ol2TsdYq4nBJ_VYxmROTy29Q8aliKcY1:45112

execute @ Nintex.Forms.SharePoint.min.js?v=5Jevl8YSbUE7ol2TsdYq4nBJ_VYxmROTy29Q8aliKcY1:41021

executePost @ Nintex.Forms.SharePoint.min.js?v=5Jevl8YSbUE7ol2TsdYq4nBJ_VYxmROTy29Q8aliKcY1:41015

ToResponsive @ Nintex.Forms.SharePoint.min.js?v=5Jevl8YSbUE7ol2TsdYq4nBJ_VYxmROTy29Q8aliKcY1:41037

ToResponsive @ Nintex.Forms.SharePoint.min.js?v=5Jevl8YSbUE7ol2TsdYq4nBJ_VYxmROTy29Q8aliKcY1:39224

loadSavedForm @ Nintex.Forms.SharePoint.min.js?v=5Jevl8YSbUE7ol2TsdYq4nBJ_VYxmROTy29Q8aliKcY1:44113

(anonymous) @ Nintex.Forms.SharePoint.min.js?v=5Jevl8YSbUE7ol2TsdYq4nBJ_VYxmROTy29Q8aliKcY1:44061

c @ jquery-1.10.2.min.js:4

fireWith @ jquery-1.10.2.min.js:4

i.<computed> @ jquery-1.10.2.min.js:4

(anonymous) @ Nintex.Forms.SharePoint.min.js?v=5Jevl8YSbUE7ol2TsdYq4nBJ_VYxmROTy29Q8aliKcY1:41427

success @ Nintex.Forms.SharePoint.min.js?v=5Jevl8YSbUE7ol2TsdYq4nBJ_VYxmROTy29Q8aliKcY1:45074

SP.RequestExecutor.internalOnMessage @ sp.requestexecutor.js:2

e.invokeTask @ zone.min.js:1

t.runTask @ zone.min.js:1

invoke @ zone.min.js:1

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VM1470:1 Uncaught SyntaxError: Unexpected token o in JSON at position 1

    at JSON.parse (<anonymous>)

    at Object.self.relayMessage (nCAF.Hub.MessageRelay.debug.js:50)

    at nCAF.Hub.MessageRelay.debug.js:45

    at dispatch (jquery-1.10.2.min.js:5)

    at v.handle (jquery-1.10.2.min.js:5)

self.relayMessage @ nCAF.Hub.MessageRelay.debug.js:50

(anonymous) @ nCAF.Hub.MessageRelay.debug.js:45

dispatch @ jquery-1.10.2.min.js:5

v.handle @ jquery-1.10.2.min.js:5

launch.js:72 Error: SyntaxError: Unexpected token o in JSON at position 1

    at JSON.parse (<anonymous>)

    at onmessage (launch.js:58)

I have a nearly identical problem to this. Did you ever discover a solution to the problem?

i am still having this issue with a few forms so i had to create new lists with new forms and archive the old ones. very inconvenient. has anyone found a resolution by chance? Many Thanks 

You could try to add a copy of the form into the content type.  Granted, you would have to have defined your library to have specific content type and not use the default.  

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