[Bug report] Password-protected download links

Password-protected download links do not work any more in Seafile 7.1. Other download links (w/ and w/o expiration, different permissions) as well as password-protected upload links work flawlessly.

1.) I create a password-protected download link
2.) I copy-paste the link in a separate browser
3.) I am prompted to enter the link’s password
4a.) when entering the wrong password, the message “Please enter a correct password.” appears under the password prompt
4b.) When entering the right password, I get a “Page unavailable - server hiccup” (see below) -

I tested on 3 different systems (Seafile CE and Seafile PE).