Does not work with custom server anymore. Does not even send a request and then times out. It works with 8.11.2 so I reverted to that one.
Edit: 8.13.2 also works, so seems like you introduced a problem when updating to 8.14 which seems to have been a major update. I went with 8.11.2 first because that was the version that is currently still working in thunderbird. Not really keen on making an account just to report it.
I just tried, and it works for me. Please contact us with details on the forum (https://forum.languagetool.org) so we can help debug this. Update: 8.14.2 also works for me - I'm sorry we can't give support here on addons.mozilla.org
