Language in the weather welcome email.
The email names my relay (called a "node" here, hmm) with its nick and "id: <DEAD BEAF .... ....>" while the sign up page asks for "Node Fingerprint".
Suggestion: Change either "id" in the welcome email or "fingerprint" on the sign up page.
To upload designs, you'll need to enable LFS and have an admin enable hashed storage. More information