While testing the sandbox environment I noticed repeated CSP blocking issues with inline scripts and styles. It looks similar to the recent sandbox configuration changes discussed here. I also reviewed similar token authentication setups while working on a Firestick integration topic.

Reference: magis tv free for firestick - https://magistvv-apkk.com/magis-tv-for-firestick/

If anyone has confirmed whether Authorize. Net adjusted the test endpoint security policy, please share the latest update. Thanks.