Premiere Pro CC 2018 files get more and more offline and lose video
After updating Premiere Pro CC 2018 this morning, I opened my project and a few files were offline.
Files that are clearly still linked to my source on hard drive. When trying to relink them, this appears:

I tried closing my project and reopening it, but to my surprise, even more files were offline...
I tried reimporting the original files without relinking them and only the audio imports, no video.
I worked on this project this morning before updating the software without any problems. These issues started appearing after the latest update.
Anybody knows how to help?
Thank you!