I just tried to clean up the existing issues in the spring4d xmldoc but hitting “Check documentation…” and then selecting “Project Group” seems to do nothing any further attempt after the first - on the first time I could see the dialog with the progress bar and then listing the existing issues in the message window - but any subsequent runs nothing happens and it still lists that latest but already resolved issues.
Closing and reopening the project group seems to make it work again - for one attempt. After that it stops again.
Just found the “Restart the DocInsight Server” option and that one also makes it work for one attempt. I send you the server log via email.