Media Mapping error in Team Project

I really need some help with this. I had someone on adobe support for three hours controlling my pc and my partners pc with some general success - team projects is buggy as hell and crashed both our computers in various ways - finally reverted back to Premiere 2017 from 2018 and all seemed to be starting up okay at least, except the media is not linking on my partner's pc - it's all offline. The media management at first showed no indication that the media was even offline, it seemed to think everything was fine. I manually deleted the media mappings and tried to create a new media mapping, but this made no difference - there was no indication that it worked and it clearly didn't because the media stays offline. So then I manually made all media offline and deleted the mappings and now there isn't even a way to create a new mapping. If I try to link a single clip individually it comes up with a media mismatch warning saying the audio clip references will be deleted!

Is there any way around this?

ADOBE - fix these bugs! I'm paying for this service that has only given me hours upon hours of painful frustration! Since buying the subscription to adobe team, I haven't been able to actually do any team work!

[Moved from regular Premiere Pro forum to Team forum... Mod]