Unable to connect to my mom's computer because it says she is on newer version? But we are both on 1

I'm helping my mom put up an Ubuntu 18.04 NextCloud 14.03 cloudserver in her house. She lives far away so last time I was at her place I installed TeamViewer 13 on there and added her computer as a confirmed device.

I also have TeamViewer 13 on my own Ubuntu 18.04 server, and I needed to trouble shoot a problem she was having so I tried to connect to it but TeamViewer keeps telling me that she is running on a newer version and therefore I can't connect. But she's not. She's running the same version as me. I even completely uninstall and reinstalled TeamViewer on my machine and used `sudo apt update && sudo apt upgrade` to make sure that everything was up to date.

So what's the deal? I guess maybe her machine could have automatically updated itself to Team Viewer 14 preview or something maybe?