Sometimes when you click on a line in a stack trace in the output window it jumps to the appropriate line in the corresponding text file. It seems that this doesn’t always happen when the text file is a local script, or the text file is a module script.
Oddly enough it isn’t a bug.
I made a post a few months ago about it:
which resulted in a trello card:
The problem is that the local scripts don’t have the same path when you close Play Solo, and so they aren’t clickable.
It’s annoying and probably should have been clickable right when stack traces were first made clickable.
( You should also move this post into the more specific Studio Bugs category so it’s seen by the right staff members 
)