Old Projects not detecting new VST's or Rewires

Sorry to resurrect a seemingly solved thread, but I’m having a very similar issue again and thought it’d be best to keep it all together…

So I spent my Wednesday recording a new track, opened a new project and all the VSTs and Rewires worked fine. I’ve gone to open the same project today and it’s telling me all the VSTs and Rewires I’ve used are missing. This time it isn’t giving me the option to locate them, just telling me they aren’t there.
I’ve tried re-scanning the folders that I know they are in, but it comes up empty. I’m really unsure of what I’m doing wrong as I literally haven’t touched a thing since they were all working on Wednesday.

It might be worth mentioning that I’m storing my projects in a Google Drive, as it’s in collaboration with someone else. So all audio files and project files go there. The VSTs are just in the normal place on my computer. This project hasn’t been opened or altered in any way from the other end since I worked on it on Wednesday.

Any ideas? :confused: