I verified that the latest bionic paratext versions connect to the new Paratext Live server.
paratext-8.0 1.48
paratext-9.0 0.40
These were in the packages.sil.org experimental repo.
paratext-8.0 1.47, paratext-9.0 0.37 are a good bit older.
Linux paratext-8.0 1.47 - corresponds to Windows version 8.0.100.84, which explains why it didn’t work.
I will ensure standard bionic packages.sil.org has the latest build, so hopefully updates for your machine will be available in the next few hours.