I am trying to upgrade from 2.23+ to the current 2.5+.
I wanted to test it out on a copy first (not production site).
I created a new MySQL database into which I imported the production DB.
I created a new moodledata folder in root, but in a new location, and put in there all contents from production moodledata folder.
And in a new subdirectory, I copied all files from production site's folder. But customized the config.php to the new DB & moodledata location and moodle files location.
I tested it out - it works perfectly - an exact copy.
I then removed all files and folders from the new subdirectory. I then copied there the 2.5+ download's files and folders.
I went back to this copy site, and it triggered the upgrade process. It passed all requirement tests. It then scanned plugins and found a few missing. I manually copied 1 activity and 3 blocks from the production site. I reloaded this page, and it showed everything ready for upgrade.
I then did the upgrade process, and no errors were triggered. Everything seems perfect.
I purged all caches manually.
Now I'm in 2.5+. Everything seems fine... until... I go to notifications and get a blank screen. I try some of the other system admin settings - such as unit tests, or other tests. Each produces a blank screen. I figure I'll debug. But when I go to debugging -- I get a blank screen.
I try to edit a course by adding a resource - a page - and the tinyMCE editor only shows two icons - a greyed out "break link" icon and an insert media icon - but nothing else - not even bold or italics.
Something definitely is broken -- but without being able even to trigger DEBUG features, I'm stumped!
Help!