Online fixes such as setting clock and turning off firewall do not work I have been trying for two days now to fix this all my friends are playing without me lol it sucks. I have seen many tickets with the same problem that say resolved but there is no solution in the ticket. You will find them if you search Invalid signature for public profile key.

It happens with private connections such as realms or a hosted server not popular servers with high amounts of players. I have tried restarting as it says but to no solution. Please help mojang mods ik it is hard to work but PLEASE