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 (https://testnets.opensea.io/assets/goerli/0xa7d748dc68e0974f74a97adbc5ac3625f13920e3/2) on OS testnet I get an error:
The page’s settings blocked the loading of a resource at https://ipfs.io/ipfs/QmNwTtz1fHfp2UuPdonWUcGTcc8rv87up2oTPKjvWJkXrr

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

this is the docs: Minting HTML Pages - Manifold Docs