Leaving this here in case somebody else might need it :
I had the same problem everybody else seemed to have and tried to reinstall to fix it at first. The lutris installer didn't work tho and after a few seconds, the gw2 launcher crashed, stating something along the lines of "browser crashed".
I fixed it by going on lutris, editing the last line of the install-script so it didn't run via proton but via fshack, clicked on "save draft" then on "test installer". The launcher got stuck on first try and I had to manually kill it, but on the second try it launched, installed the game and I can now play without issues.
In case anything is unclear, message me.
Leaving this here in case somebody else might need it : I had the same problem everybody else seemed to have and tried to reinstall to fix it at first. The lutris installer didn't work tho and after a few seconds, the gw2 launcher crashed, stating something along the lines of "browser crashed". I fixed it by going on lutris, editing the last line of the install-script so it didn't run via proton but via fshack, clicked on "save draft" then on "test installer". The launcher got stuck on first try and I had to manually kill it, but on the second try it launched, installed the game and I can now play without issues. In case anything is unclear, message me.