Error cause: An error occurred. Please contact Tatum support

Hi there,
I am facing the issue that NFT are not minting and i am getting error even i have the mainnet metamask wallet account and also have the tatum starter PLAN API key but don’t know why this issue is facing again and again.
I have attached above URL of the live project and you can test it at your end also.

The page I need help with: [log in to see the link]