Thread:Project:Support desk/Web updater for upgrade 1.19 1.22 blacks out/reply (4)

Resolved!

(1) As it turns, my root folder contains some useful logs.

(2) The culprit was quite simply a setting in LocalSettings.php that was not properly commented out. This in turn may very well be the reason why setting error logging in localsettings had no effect, hence the blank screen.