No VPN, but tried to make a different account, same problem. I did succeed in logging into his account on my computer. So I thought maybe it’s something with his tablet. Updated and restarted, same thing. Tried a different tablet, same thing. Then I tried to log into different minetest servers using his tablet and had the same problem on many others. Did get into a couple though. Not sure why it works on some servers, but not others. Both tablets are android. If anyone has ideas, I’m open to advice.
A blocky survival game.