The application can't be opened. -50
After the latest system update to Sonoma 14.4.1, I get this error message in Mail Version 16.0 (3774.500.171.1.1) every time I edit one of my Rules. The rules usually don't execute unless I select a message and use the left click menu and select "Apply Rules".
How can this be fixed?
MacBook Pro 13″, macOS 10.13