Problems with displaying dynamic NFTs on Opensea

Trying to mint a dynamic NFT using a html page as described in your docs

I can see the image display fine at IPFS

But when viewing the minted token ( on OS testnet I get an error:
The page’s settings blocked the loading of a resource at

Is there something I need to do to allow content loading from IPFS on opensea?

this is the docs: Minting HTML Pages - Manifold Docs