I've had this show up as well.
Access details:
Version: v1.149.5-2d6684d-256 (us 1.149)
World: Sinya Arda
Browser: Bluestacks Mobile Emulator (Android)
OS: Win 11 64 Home
Screen resolution: 2560 x 1600
Account name: OIM20
Reproducibility: 1/5 = happened once
Mine happened on event quest #24. Screens:
Date and time index in lower right. Third screen is to verify version of game, since I did update it before the error code.
The visible code doesn't affect completion of the quest parameter, though. (screen two)