Cubase 13 Pro: insert fx-plugins in controlroom- and master-channel

After working with the controlroom a long time, i noticed that i`m suddeenly not able to acces my insert fx neither in the master- nor in the controlroom-channel.
Clicking on the “e”-button of the according fx, nothing happens.
What´s going on? I din´t change any setting!

That’s strange. It works here as intended.

Did you try opening C13 in safe mode then check?

I reinstalled the according plugins - mainly in VST3 - and now the third-party plugin work and open up. But e.g. the Steinberg Limiter still cannot be opened.

Opening C13 in safe mode i didn´t try yet!