Eitan, I'm not sure this is really an m2e issue. The message
"Launch configuration MyMaven references closed project MyMaven"
indicates that your "MyMaven" project references itself. If you go to
Project -> Properties -> "Project references", such a selection should not
be possible. I'd check the
After installing eclipse-java-2020-09 when
I close a project I get this stack trace:
For example:
!ENTRY org.eclipse.m2e.logback.appender 4 0 2020-10-04
08:29:28.711
!MESSAGE Launch configuration MyMaven references closed project
MyMaven