ROB RUN Error Codes & Fixes (E-0101 to E-0904), Crashes & Anti-Cheat

ROB RUN error codes and how to fix them

Updated Nov 7, 2026 · Servers & wipes

Quick answer

Kefir's help center lists ROB RUN's error codes: E-0101/E-0110 can't reach the server (check your connection), E-0102 data blocked (public Wi-Fi, proxy or antivirus HTTPS scanning), E-0301/E-0302 outdated version (restart Steam and update), E-0303/E-0304 corrupted data (wait 10–15 minutes, verify files), E-0501/E-0502 Easy Anti-Cheat not running, E-0601 no keyboard and mouse (remote desktop or cloud streaming). Most fixes come down to verifying game files in Steam.

All codes and fixes are from Kefir’s help center article “What should I do if I get an error code?”, reworded.

Network and data

Code	What it means	Fix
E-0101 / E-0110	Can’t reach the server to download config or startup data	Check your connection — do websites load?
E-0102	Data arrived broken or was blocked (guest / hotel Wi-Fi, antivirus, firewall)	Use a home network without a login page, turn off any proxy, pause your antivirus’s HTTPS scanning
E-0124	Internal asset-loading error	Verify game files in Steam
E-0201	Connection to the game server lost	Check your connection, restart the game (and see server status)

Version and files

Code	What it means	Fix
E-0301 / E-0302	Game version is outdated	Close the game, restart Steam, update
E-0303 / E-0304	Downloaded data corrupted or doesn’t match the version	Wait 10–15 minutes, turn off proxy, verify files, update

Account and authorisation

Code	What it means	Fix
E-0401	Steam authentication failed	Steam in online mode, correct account, restart Steam and the game
E-0403 / E-0404	Epic Online Services authorisation problem	Verify files, add the game to antivirus exceptions, restart your PC
E-0405	Steam not responding, or antivirus blocked a game library	Check antivirus quarantine, start Steam, verify files, launch from your library

Anti-cheat and input

Code	What it means	Fix
E-0501 / E-0502	Easy Anti-Cheat isn’t running, is corrupted or blocked	Launch only through Steam, pause antivirus, verify files, restart PC
E-0601	No keyboard and mouse detected (Remote Desktop, cloud streaming)	Connect a physical keyboard and mouse before launching
E-0904	Unexpected internal error	Restart; if it repeats, copy the error text and send it to support

Not an error code?

Stuck loading or freezing: check your connection, restart the game and Steam, update your GPU driver, verify files (Kefir help center).
Kicked during an outage: the servers had repeated downtime on Nov 6 → server status.
Everything gone: it may simply be the weekly Federal Raid.

FAQ

How do I verify ROB RUN's game files?

In your Steam library, right-click ROB RUN → Properties → Installed Files → Verify integrity of game files. Kefir recommends it for E-0124, E-0303/E-0304, E-0403/E-0404, E-0405 and E-0501/E-0502.

Does ROB RUN have anti-cheat?

Yes — Easy Anti-Cheat (kernel-level, per the Steam store). E-0501/E-0502 mean it isn't running, is corrupted or is blocked: launch only through Steam, pause your antivirus, verify files and restart your PC.

What is error E-0601?

The game didn't detect a keyboard and mouse — common with Remote Desktop or cloud streaming. Plug a physical keyboard and mouse into the PC before launching.

My progress is gone — what happened?

First check whether your server just had its weekly Federal Raid (wipe) and that you're logged into the right Steam account. If neither, contact Kefir support with your UID (Esc → under your character name → Copy UID), name and the time it happened.