Does anyone know where this error comes from? I'm not sure what could be causing it. Please see attached. 
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Hello,
Where exactly do you see this error in the application?
Thank you.
Regards,
Dean
Dean Parrett,
It shows up on any page. Took this screenshot on the opportunity page, I was just editing lookups and saw it pop up on a lookup page. So it's not restricted to one page. It also get's triggered on a page load. So after a refresh of the page is when I see it.
Dear Tyler,
Do you have enabled debug mode? Also, does it make any affect to any functionality?
Regards,
Dean
Dean Parrett,
Debug mode is not enabled. Does not affect functionality from what I could tell. My thinking was since the environment is not in "prod mode" it could possibly be running slower, but that is just a guess. What do you suggest?
Tyler Rainey,
Can you please try generating the source code for all items and compiling all items and relogin to the app after that?
Thank you in advance!
Best regards,
Oscar