C9.5 + 10: No insert nor send effects working!

This is very strange: I imported 40 tracks audio files for a project and now I can’t use insert nor effect plugins! I’m only able to use and edit plugins via Group Channels output. Anyone?

And you „can not use insert, nor effect plugins“ because of what? You donˋt know how? They wonˋt load? They load but donˋt work? Is it possible to provide a minimum amount of useful information :unamused:?