Unfortunately I’m not super familiar with Metaplex yet.
You might be able to find more help on the Metaplex Discord:
I still like filling the forum with answer’s to people’s questions, though, so if you find the answer, it could help somebody else if you post the answer here!
In my case, the problem was “gatekeeper” was not null in config.json
Just make sure once you update “gatekeeper” in the config.json, run the “update_candy_machine” command instead of “upload” that you might have run before.