An unexpected error has occurred. The version for the given form was not found. SharePoint/Winshuttle inconsistency.
This error happens if there are processes pending for older versions and the older version got deleted.
To avoid such error , its recommended to finish all processes associated to the older versions and archive the version and then delete.
1. Check to see if the form template library (just called "Forms") has versioning limited to a particular number from Library Settings>Versioning Settings. If it is, uncheck it.
Please set it as per below with boxes unticked so that there are no limitations set:
The above solution will avoid the version Sharepoint\Winshuttle error for forms in future. But in case the issue happens ,please contact Winshuttle support.