Hi there…!
Definitely a message box problem which wasn’t removed while developing.
Maybe it’s housed in a conditional statement which triggered it when ran remotely.
Maybe the version that you are using in Orch. might not be updated (so if running from the tray does not produce the message box publish the project again and make sure that the latest publish project is deployed through orch.)
To remove that message box refer this :
How to identify where is my message box in workflow? - #5 by Raghavendraprasad
Hope this solves the issue.
Regards 
Anil_G
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