Hey Enrique,
Hope you're doing well. Just wanted to flag a quick bug that should be pretty easy to fix. The error message for account delegation is wrong. If someone is trying to delegate to an account that has delegation enabled but hasn't followed the account they're supposed to be delegated to, they get this error message:
The error message should probably say something like:
"The person you are inviting to be a delegate only accepts invites from accounts they follow."
Hope this helps! - Gary