This is the common error explaining what you are missing from the saved state of that creators patch.
It was created with the first version of rack and saving in your session will clear that error and also from the “manage plugins”you need to add the ML Modules plugins. Close rack and reopen. There is still no real-time plugin addition.
After you add the modules and save the patch the next time you open the errors should clear. Caution this will start to show you some of the paid plugins you will want and personally I’m now about $150into this platform, so watch out! You will get hooked on adding modules it’s SO GOOD!! Also welcome. I own Reaktor Blocks too and this is still the more realistic experience. I like both but vcv rack is on Fire.
Okay, saving old patches removes the error message but the modules are still not loading.
It seems that adding free plugIns from the plugin manager is not possible at the moment and we have to wait until vcv 1.0 will be released as it states on the vcv homepage :
"Note: Automatic downloads for third-party free plugins has been disabled and will return after Rack 1.0 is released. In the meantime, direct download links to ZIP packages are provided for each operating system."
I added the plugins via the Zip packages but the error still remains after reloading some re-saved pathes.
Its weird that opening other pathes including the same "missing" plugins is working.
For instance :Both patches "On-The-Run-attempt" and "Generative-Ambient-Ducking-Patch_Song" are containing the 8 channel drum mixer by Autodafe.
Opening "On-The-Run-attempt" is working fine but "Generative-Ambient-Ducking-Patch_Song" is missing the 8 channel drum mixer as well as some other already installed plugins which are installed via Zip.
EDIT : Symptom Cause and Solution
if anyone's interested / https://github.com/VCVRack/Rack/issues/765 (https://github.com/VCVRack/Rack/issues/765)