Hey @LamaX could you add Log message and pass the same Message box value into the Log message .and then publish the new package and then try run new publish package.and before doing that can you check project.json and inside that try to find entrypoint and if “isBackground”: true make it false .
or If the robot is running under a background session (for example, started from Orchestrator or through a scheduled task), UI activities like Message Box won’t display because the process is executed in Session 0 or Non-Interactive mode.
cheers