Virtual Mix Rack don't open - load

I’m with C10.5 on a Win10 updated 20H2
I try to install Slate VMR 2.5.2.1 but cubase blacklisted VST2 (and not available to reanable) and put VST3 on Other but it’s not showing up when I click on it. Nothings happens.
Does anyone has a clue about why this happens?