Once Human error code 120: can't enter scenario (fix)
Written by
Last checked
September 23, 2026
Selecting and trying to enter a new scenario (a time-limited game mode server) fails with an "error code 120" message and blocks entry.
Also appears as: once human error code 120, once human error 120, error code 120 scenario, can't enter scenario once human
Two separate Steam Discussions reports describe hitting error 120 when trying to enter a newly-selected scenario, one with several replies from other affected players. Neither thread got an official response or a confirmed fix, and the reports don't pin down whether it's a scenario sign-up cap, a server assignment glitch, or something else — so this stays reported rather than confirmed until a clearer cause surfaces.
What to try
- 01Wait a few minutes and retry selecting the scenario — reports describe this happening around scenario sign-up/opening windows rather than as a permanent block.Unconfirmed
- 02Verify your game files through Steam's Properties menu before retrying.Unconfirmed
- 03If one specific scenario consistently throws 120, try a different scenario server in the same region, and check oncehuman.game/news for a sign-up lock or merge notice affecting that scenario.Unconfirmed
Did this fix it for you?
Your answer helps the next player know whether these steps are worth trying first.
What people are saying
Notes from players who've hit this one — no time limit, an answer from months ago is still an answer. Say where you are and what you see on screen.
No links. Anonymous, no account. Keep it about the game.
- Nothing reported here yet.