An update for posterity on SP-initiated flow abruptly closing.
The reason this was happening is our application was fetching a config JSON file that returned with a 404
status code. This config file was completely unrelated to the SAML implementation.
So, just know:
- if there are any failing calls in your app - it will fail the SP-initiated spec during app submission.
- check your JSON export in the submission wizard and look for
"statusCode": 4
and see if you can find any “bad” response codes.