Edit: So it looks like the problem was the underscore in the URL. I replaced it with a dash (-) and it works fine.
My app is working ok on localhost.
After deploying to Nodejitsu, I am attempting to edit the app from my partner dashboard and change the 'Application URL' from
http://localhost:3000
to
http://mdausmann.guidebyside_shopify.jit.su
I get the following message on the edit page... 2 errors prohibited this api client from being saved
There were problems with the following fields:
Callback url is invalid
Application url is invalid
This doesn't seem to make much sense to me as it is a valid url and is up etc. I also tried adding a :80 but that didn't work.
Any Ideas? Michael