I am extremely sorry for the downtime and the late fix (was in the hospital due to lung infection!). The downtime was mainly due to full disk space. I have since bumped up the server resources. Will follow by cleaning up old cache (cronjob isn't working properly on this, server monitoring reported the wrong free disk space when in fact it's already zero space!). We are all good now!
I will update to v2.5.x some time this week. Sorry and thanks!