Oooook, so now I can no longer ban.

I can no longer ban IP address by clicking on Ban IP Address. I can no longer ban member by clicking Ban Member. I can no longer syndicate with Stop Forum Spam and Beyond. Clicking on either of these gives me the "An Error Has Occured" Page.
 

An error has occurred

The requested page gave no output.

This is bad. This is a big welcome mat for the spammer army. 

Sorry about that, looks like nobody tested banning someone yet.

To fix grab these latest files from git (https://github.com/ocproducts/composr):

adminzone/pages/modules/admin_ip_ban.php
adminzone/pages/modules/admin_trackbacks.php
site/pages/modules/warnings.php
sources/forum/cns.php

Also a new release will be out quite soon.

Still broken I'm afraid. Even with latest release.

Automated fix message

OneRingRules said

We have chased this up today and they cannot see any issues that would have caused this. They are looking to restore the complete db or site in the next few hours we are hoping…

This issue has now been filed on the tracker as issue #2665, with a fix.

Sorry there was a second issue. This is fixed above, and also I wrote an automated test to find other such issues (broken screen links) automatically in the future.