Great mini-tut. Kinda bizarre issue. Have a toy working node.js app on DO. Following the instructions, set up foo.asia and *.foo.asia as domains. When I go to use let’s encrypt, an error surfaces saying invalid character app.#*.foo.asia. I am pretty sure that LE doesn’t allow for wildcard domains. But if I remove it and leave only the first one, I get the error message, “CA marked some of the authorizations as invalid, which likely means it could not access http://example.com/.well-known/acme-challenge/X”. Thanks in advance.