Bug #103309 report bug
Submitted: 13 Apr 15:56 Modified: 13 Apr 16:01
Reporter: JUTAMAST AKKAVASAKUL Email Updates:
Status: Unsupported Impact on me:
Category:MySQL Workbench Severity:S2 (Serious)
Version:6.3 OS:Microsoft Windows
Assigned to: CPU Architecture:Any

I don't close window workbench . please check 

This's message 

We are sorry for the inconvenience but an unexpected exception has been raised by one of the MySQL Workbench modules. In order to fix this issue we would kindly ask you to file a bug report. You can do that by pressing the [Report Bug] button below. 

Please make sure to include a detailed description of your actions that lead to this problem.

Thanks a lot for taking the time to help us improve MySQL Workbench!

The MySQL Workbench Team

How to repeat:
I'm try to close again more 10 times
[13 Apr 16:01] MySQL Verification Team
Thank you for the bug report. Quite older version, upgrade to latest release version 8.0.23.