Problem:
The user would like to offer a questionnaire or poll for visitors and create a user afterward. This may involve the possibility to change the username at the end.
Solution:
WordPress does not have a supported way of changing the email and the username. Especially the username. For that matter, some plugins have filled this gap, such as:
The issue here is that the user is getting the "Toolset plugin cannot connect to toolset.com" warning on their dashboard.
Solution:
This error generally occurs when you've migrated your site and the url changes and your Toolset plugins can no longer validate with our servers.
To check if your plugins are able to validate correctly you will need to go to Toolset -> Dashboard, then click on help in the top right hand corner. Select the Toolset Debug tab then click "Toolset Debug Information and Troubleshooting"
From there you will be taken to the Toolset Debug information. Scroll down on the page until you see the link for "Installer Support". Click this link.
You should now be able to see your site validation information. If you're see "Toolset site key not matching for http://www.xyz.com" then you will need to regenerate your site as the URL may have changed and your key isn't validating for the current URL.
Toolset Forms plugin stores post expiration date as a custom field "_cred_post_expiration_time" in timestamp format, you just need to update the custom field "_cred_post_expiration_time" value, like this: