Refused to set unsafe header "user-agent"

[Snowby666]

I have been using the iFrame API for almost 4 months and everything was normal until yesterday when this error log appeared. I believe this issue was due to the new policies on deprecating permissions in cross-origin Iframes. 
Hope it will be fixed soon!

[marblecompass]

Having the same issue since a few days too. It did work the days before weirdly enough.

Same issue: https://community.spotify.com/t5/Spotify-for-Developers/Iframe-api-is-not-working-as-documented/m-p/...