Hello, I have a server registered on GameTracker, and since the last time when I access this site it tells me that I am blocked

You have been blocked from accessing GameTracker.com

What would be the cause? please answer, because I can't change my gametracker profile

And yet you have managed to post.
It happens occasionally. It is normally temporary.

When it happens to me I use another browser until my preferred browser is able to access the site again.

Others prefer to clear the browser cache.

Yes, it is mildly annoying I admit.