I have a problem with a very basic workflow that has been running correctly for months. The approvers click in the e-mail notification but the task form doesn't open. It just says "Sorry, something went wrong". I also can't open the task form when editing the workflow. It just doesn't open, no error messages.
A workaround could be to use the SharePoint default approver form but that's not what I want.
I use a request approval action in SharePoint 2013.
Anyone has an idea on what the cause may be?