Please upgrade to 2.3 here.
The 2.2 and earlier branches are no longer being updated.
SQL Error when registering new user
Trying out a fresh install of 2.3, and everything seems to have been working fine. However, when I try to register a new user I get this error message:
MySQL Version is
mysql Ver 14.14 Distrib 5.6.16, for debian-linux-gnu (x86_64) using EditLine wrapper