The bug with the update has now been resolved and 2.4.0.7 release is available on Github, and will be available shortly via the WordPress repository.
The issue was due to some debug information being output unconditionally. This was mangling JSON data endpoints (prepending to data making them unreadable) and redirections from working (headers already sent error.) Here is the issue on Github:
https://github.com/netmix/radio-station/issues/413
Since the Freemius SDK is indeed updated to 2.3.2 in Radio Station 2.4.0.6, we believe the “unauthorrised AJAX calls” that scanners still are reporting cannot be correct. The scan should pick up the new version with the security patch by Freemius in that version specifically to fix this. We will monitor this and make contact if it doesn’t change.
@jaxrachel If you can let me know any of the line numbers for those errors/warnings if you are still getting any after updating to 2.4.0.7, I can check those out too. I’d expect most/all of them would go away with this bug fixed.