Had a problem that I could not log in to the launcher after 08.03.2022

the fix was to delete the etc folder in steamapps->common->FINAL FANTASY XIV Online

it seems that it only happens if you have tried the trial on the computer and that file isn't removed.

could link my account to steam after this, but had to redownload the game after logging in.

the only file in the etc folder was a file named install.def with the text freetrial

sorry if this is the wrong please to post this.