with this same problem and the usual response seems to be reinstall the latest version of FLStudio, but I just upgraded and downloaded the newest version like 2 days ago. I'm using Producer Edition v20.5.1 [build 1193] - 64Bit ...
found". None of the links on the Plugin Manager Opened window are active. My vst plugins work just fine in standalone mode - how can I get them to work in FL if I can't initialize a deep scan? ...