When deleting workspace "Windows->Workspace->Edit Workspaces" error happens A dynamic_cast has failed, if any workspace has then selected.

​@mirza36163514e0ud 

This is the Adobe Aero forum. If you mean After Effects (AE), here is the forum you’ll want to repost to:

https://community.adobe.com/after-effects-526

Jane

​@mirza36163514e0ud 

Which Adobe application are you using?

Jane