I tried the ZKS NFT mint. I used the help document from this url :
It’s a little old but still works.
If I share where I feel a little complicated it is the “fee token settings” from the gear icon which is on the top left of page. I think you can use a link in error alert for this. I mean error explain something yes but if it’s include a link directly it will be useful for user.
here is my wallet : 0xe4815ae53b124e7263f08dcdbbb757d41ed658c6