Cubase projects cannot locate plugins appear and are in the right folder

Hi, I have just re-installed kilo hearts onto Cubase 12, but when I open projects, they say they cannot locate the plugins, and that they are missing. However, I can still use the plugins just fine when opening up a new instance. A few of the tracks however can locate the plugin somehow. I have already re-installed and checked that the plugins are in the correct folder, but Cubase is still unable to recognize them as the same plugin as in the projects. Any help on this matter would be greatly appreciated.

BTW I am on mac os

Hi and welcome to the forum,

Did you maybe use VST2 version in the past and now you are using VST3?

No, I have always used VST3 version.