Ok. I literally just spent 6pm since last night, until 12pm today debugging (minus 5 hrs of sleep) because of two whitespaces.
I am setting up a server, and I had to copy one line of configuration.
signup_flag_on: true
I unknowingly copied the line without copying the whitespaces.
It is a YML file, so whitespace is required.
Ok. It did not ruin my life, but fuck me nonetheless.