I'm attempting to resolve an error that is preventing me from showing google-adsense ads on an amp-html site that I built and am hosting on an nginx server. I have searched and read through quite a few similar questions on Stack Overflow, Google Adsense and Amp By Example documentations.
I placed an amp-ad, per Google's instructions. The page itself loads properly, but with for whitespace where the ad should be. In the console, I get this error (twice):
Blocked a frame with origin "https://d-1234567890.ampproject.net" from accessing a frame with origin "https://example.com". Protocols, domains, and ports must match.
I recently moved the Nameservers to a new server, which now supports https instead of http. The site appears to still be verified in Adsense, but is it trying to send the ads via the wrong protocol?
Protocols must match -- seems to be the case, as both sites are https.
Domains and ports must match -- ok, but how to verify these?
Beyond this, I'm not quite sure how to troubleshoot the issue, other than blindly turning off security measures. Should I be looking at my headers (X-Frame-Options, X-Content-Type-Options, etc.)? Or my Content-Security-Policy header? Or is Google Adsense still using the old http protocol?
FWIW, I am also getting these (related) warnings in the console:
[Warning] The resource https://3p.ampproject.net/234567890/f.js was preloaded using link preload but not used within a few seconds from the window's load event. Please make sure it wasn't preloaded for nothing.
[Warning] The resource https://pagead2.googlesyndication.com/pagead/js/adsbygoogle.js was preloaded using link preload but not used within a few seconds from the window's load event. Please make sure it wasn't preloaded for nothing.
Thank you in advance for your help.