Unexpected dialog appearing in Plasmic Studio.

Oh dear, I am seeing this dialog but don’t want to replace / delete anything as I think they should be OK.
Is there another way to get into the file project so I can debug this? Liek would I have to do this via code and not Plasmic Studio?

Simple fix - There was No local host URL.
This has tripped me up a few times in the past, so I caught it this time. Maybe newbies would appreciate a warning, before they go deleting component from there perfectly OK design.