Need Help: List of installed Plugins not visible, Vault works as usual. How can iget the List displayed?

First, search the help docs and this forum. Maybe your question has been answered! The debugging steps can help, too. Still stuck? Delete this line and proceed.

What I’m trying to do

After Windows - Restart the List of installed Plugins disappeared and is no loger visible.
The Vault is still workin, but I cannot change the Plugins…
I couldn’t find a relevant Topic, sorry!

Things I have tried

I found no adequate Post in the Forum