a new SF18 pro suite, built 21 installation.
Windows 11, 32GB Ram.
SF built in effects works perfectly.
All other plugin effects are detected and listed correctly.
The problem:
When open any plugin effect, I get a generic single slide plugin window instead of the dedicated plugin graphic interface panel which is not shown.
This makes All Plugins, including the Suite provided Izotop plugins to be not usable.
some more info:
All plugins are new, VST3 64 bits.
VST directory is under windows 64bits program files folder.

I appreciate any Help

Thanks