Vanilla 2.6 is here
! It includes security fixes and requires PHP 7.0. We have therefore ALSO released Vanilla 2.5.2
with security patches if you are still on PHP 5.6 to give you additional time to upgrade.
Annotated CSS theme, Vanilla 2.5.1 compatability [RESOLVED]
This theme looked like just what I need but keep getting this error when I enable it: