send mail if checkbox is checked in nintex workflow

[lalitkasa88]

I am new to nintex workflow I am trying to check the checkbox value is checked or  not if its checked then I need to send mail . but I am getting below error . can I get any help to resolve this error .

Error publishing workflow. Unable to cast object of type 'System.Activities.InArgument`1[System.String]' to type 'System.Activities.InArgument`1[Microsoft.Activities.DynamicValue]'.

If the problem persists, contact Nintex support, and quote:

Correlation ID: dddfb89d-524c-4b70-9b4d-40206b48eb38
Tenant ID: cc7f83dd-bc5a-4682-9b3e-062a900202a2
Time (UTC): 2016-11-11 04:38:15

Please help me in resolving the issue 

Regards,

lalit

[kapilkjoshi]

What is your Nintex and SharePoint versions? could you please paste the  screen shot of the condition?

[ramyaramasamy]

Hi, We are also having the same issue and ours is SharePoint Online and Nintex for Office 365. We have a Choice field here and using a Conditional Branch to compare the values and have separate loop of actions according to the combination of selections. I have attached the screenshot of conditional branch. It would be great if you could help us on this.