Useless error message

When executing code, the following error message is displayed:
Screenshot from 2021-10-08 21-22-50
The code runs fine on my computer. It is in the vacuum cleaner exercise

Hi, thanks for the report.
Are you running with RADI 3.1.7? This error shows if the line while (1): is used instead of while (True): If this is not your case, send me your code on a message or paste it here so I can locate the error.