nostr:npub10ae605fgpw08r8d2u7u65wu82n5n02gzv4wef797z5dk7g3w8smq7xnlyc okay I sincerely cannot thank you enough: this was the issue. It's funny because the checkbox even says "recommended" in parentheses. But unchecking that box, they were able to read the gerbers immediately.

You have saved my manufacturing run. 🙏🏽