I just created a lemm.ee account and didn't realize an e-mail verification link was sent. I tried logging in. When I did, the login button temporarily changed to a loading icon, and then just left me at the login in page. There was no indication that I needed to verify my e-mail.
It would be helpful to have some error text to indicate the e-mail is not verified when the login fails. Right now, users are likely to assume lemm.ee is broken.