Issues pushing to device- Please help

I do not understand why it has stopped being able to send to my device for testing

&stc=1

I am also unaware of where that key is suppose to sit, either on the Development computer or within the testing device?

&stc=1

Hoping that gives some clarification.
It is engine 4.13.1, based on blueprints.

I really can’t tell much from looking at the screenshots. A full log (text) would be more useful. I recommend creating an AnswerHub.

From what I can tell, I believe you may have a corrupted UPL XML file from a plugin.