Today the hotfix of the version 2_28 has been applied to all servers.

Fixes on all servers:

1) The building marking button for movement has been fixed;
2) Ally flags are now visible on mark towers;
3) Diplomatic relations end correctly after the ending of a contract;
4) Player nicknames are shown in logs.

Koryo:
1) The building of libraries is allowed in forts.

Aragon:
1) The bug, where some players get thrown out of the tavern has been fixed.