Hello,

When trying to claim server, the "Recaptcha failed" message box appears.
By the way, there is absolutely no captcha field in the form / on the page. There are no errors or warnings in the web browser's developer console.

Debug:
request is https://www.gametracker.com/tools/gameserverSetOwner.php
Parameters:
csrf_token: some string value
GAMESERVERID: some integer value
No more parameters related to captcha were sent. P.S. I'm a bit web developer so I know how captcha must work.

Assuming you mean this server; 34.254.84.235:27016 ?
I just clicked on 'None - Claim Now!'
link: https://www.gametracker.com/server_info/34.254.84.235:27016/manage/
The Recaptcha fieled appeared immediately.
Obviously I could not claim the server as the name was not set for claiming.

See: How can I claim my server page?

Sorry, it was not Gametracker's fault.

Now I see where the captcha field is shown (just above the claim button, there was nothing when I wrote that post). When clicking checkbox it was "recaptcha connection failed" messagebox, but after 3-4 retries it passed. It's some issue when connecting to Google servers.

Solved.