Realms: Invalid session id (401)

Can't log into Realms. Invalid session id (401).

Username: xevaxtavax. (Active account and realms subscription).

[19:10:16] [MCO Availability Checker #1/INFO]: Could not authorize you against Realms server: Invalid session id
[19:10:16] [MCO Availability Checker #1/ERROR]: Couldn't connect to realms:

Pls let me know if you need the full console report. Please don't close this as Duplication with issues which are either unsolved due to lack of information or caused by cracked clients. Thanks.