ROB RUN Error Codes: Causes and Official Fixes
Find Kefir’s official guidance for common ROB RUN error codes, including the checks it recommends and when to contact the game’s support team.
Match the exact code in your error window before following a fix. Kefir groups the codes by cause.
| Code | What the developer says to check |
|---|---|
| E-0101 / E-0110 | Server configuration download failed; check your internet connection. |
| E-0102 | Download blocked or corrupted; try a home network without a login page, disable proxy, or temporarily pause HTTPS scanning. |
| E-0124 | Asset loading problem; verify files in Steam. |
| E-0201 | Lost server connection; check connection and restart the game. |
| E-0301 / E-0302 | Old game version; restart Steam and update. |
| E-0303 / E-0304 | Corrupt or mismatched game data; wait 10–15 minutes, disable proxy, verify files, then update. |
| E-0401 | Steam authentication failed; confirm online mode and the correct account, then restart. |
| E-0403 / E-0404 | Epic Online Services authorization issue; verify files, add an antivirus exception, and restart the PC. |
| E-0405 | Steam not responding or system library blocked; check antivirus quarantine, verify files, and launch from Steam Library. |
| E-0501 / E-0502 | Easy Anti-Cheat issue; launch through Steam, check antivirus interference, verify files, and restart. |
| E-0601 | Keyboard or mouse not detected; connect physical devices and avoid remote access. |
| E-0904 | Unexpected internal error; restart, then send the error text to support if it persists. |
| All code meanings and steps above come from Kefir’s error reference. An error code is more specific than a generic loading failure; use the code-specific instruction first. |
Source and version
Official ROB RUN support answer; checked November 10, 2026. Exact game build not stated.
FAQ
Should I use the same fix for every code? No. Match the exact code to the official table above.
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