On linux, I had a .nupkg 1.17.0 launcher package in /home//Games/eve-online/drive_c/users//AppData/Local/eve-online/packages that I just extracted and moved it to …/Local/eve-online, basically a directory backwards.
I was using an old launcher version which worked fine up until now. It was stuck on build 3569502 and updated to 3575015 once I used launcher 1.17.0. Now I’ll just revert to the old launcher.