as far as i can help, reinstall blockland or relaunch it
It's an internet problem. Your internet is too slow or something.
It's not a matter of internet speed, it's likely that a firewall of some sort is blocking blockland.Be sure that there isn't any, or that blockland is added to the exception list, and also check your modem/router settings for a firewall if you can.
If your key was revoked, you wouldn't be here.
Seems to happen on both my blockland keys.
I had this problem years, with alot of a's, ago, it was because of my internet speed, 1mb/s, since then I've upgraded to 3, then 10, and its been fine, mind posting a speedtest?
This has happened to me before as well. It depends on your ping, your internet speed and your computer speed (Or not this).