Hi,
I’m importing Manifold contracts into Crossmint and the instanceId is a required parameter in the checkout button mint config. However, this id only seems to exist for Mainnet contracts, after a claim page has been created. Am I correct here? Or should I be looking for instance ids relating to the Creator Contracts rather than the NFT contract? The Crossmint project isn’t verified yet so I’m unable to test on Mainnet.
Any advice much appreciated 
Tom