Error depolying a Claim Page on Goerli

I’m trying to mint a token on Goerli testnet via the Claim Page app.

I go through all the steps then hit Publish and then the app tries to switch to mainnet. If I cancel the switch in MetaMask I get this error:

Wrong network

But if I switch networks I get this one:

call revert exception [ See: Error Codes ] (method=“isAdmin(address)”, data=“0x”, errorArgs=null, errorName=null, errorSignature=null, reason=null, code=CALL_EXCEPTION, version=abi/5.7.0)

I’ve deployed several claim pages before and didn’t have this issue, so I’m sure it’s a bug. Can anyone help?