In T5463#172345, @florianb wrote:

I ran into the same issue, it turned out, that the permissions for /phabricator, /libphutil and /phabricator as well as for the preceding parent-directory had to be 755.

Until i figured this out i tried running all directories with less permissions (750) - which did result in a

AuthorizedKeysCommand /usr/share/phabricator-ssh-hook.sh returned status 126

I really don't know which user is here trying to invoke whichever script or command (since all defined users [git, phd, www-data] are nicely coupled in their phacility-group), but since i wasn't able to track that down i think that's a good compromise. And it should be safer than letting root invoke the AuthorizedKeysCommand.

Hit by the exact same issue of Unknown column 'event.dateFrom' in 'order clause', and arrived here through search. In hope this helps somebody else, here's how I fixed it.

Another workaround is directly editing the Phabricator database (e.g. with phpMyAdmin).