instal the last version for apple Cockos REAPER 6.82

Once done, open Reaper >Properties >VST > Re-scan > Clear Cache & Rescan.

Go to Offline Installer, search and install the plugins you were having problems with.

Re-install all plugins on the current version you know work, and skip the problem ones.In Waves Central, click Settings then Complete Waves Cleanup, this will uninstall everything except for user data.Extract and install on your computer, Waves Central should find it instantly.Download the Offline Installer of the last version you had working, for me it was v13.(It’s a big download, over 6 gb because it’s every possible plugin.).In Waves Central, go to Installed Products, and on the bottom click Legacy Versions.Identify which plugins aren’t working, and make note of them.The fix below is how to revert the plugin to the previous version. The long short of the problem is you had an old version of a plugin in your project, and when you reinstalled the plugins on your new computer it’s a new version, and for some reason Reaper doesn’t think they are compatible. It doesn’t seem that all v14 plugins have this issue with Windows 11 & Reaper, just select ones.

Instal the last version for apple Cockos REAPER 6.82