When adding or configuring controls on a Nintex Form, a 'Something Went Wrong' error appears.
A 'Something Went Wrong' dialogue box appears when a control is added or configured in a Nintex Form. You may find that this issue is only occurring on one SharePoint Site, and other sites may be working as expected.
Navigate to Site Settings > Site Administration > Regional Settings and check that the setting is correct for Time Zone. If issues persist, please try making this setting on the affected site match the setting on a working site.
at Nintex.Forms.SharePoint.Administration.NFTimeZoneCollection.GetById(Int32 id)
at Nintex.Forms.SharePoint.PropertyEditors.TimeZoneToLivePropertyEditor.HandleControlPropertyDesignerPageLoad(Page page)
at Nintex.Forms.SharePoint.NfsUtilities.RegisterControlsForJs(Page page, Control controls, String datePickerScript)