2.3.0.2 standard extension error

my extension dropdown list is empty, clean install...

I had this error on the extension page:
Notice: Use of undefined constant GLOB_BRACE - assumed 'GLOB_BRACE'

and i resolved it with the solution pointed out in this forum http://forum.opencart.com/viewtopic.php?f=190&t=165375

basicly it comes down to replacing
GLOB_BRACE
with
(defined('GLOB_BRACE') ? GLOB_BRACE | GLOB_ONLYDIR : GLOB_ONLYDIR)

this resolved the glob_brace error, but there are still no extensions in the dropdown list

Anybody gotta clue?

I've managed to fix a little part of the problem. I ignored to fix called in the link above. I just removed the glob_brace part as suggested in other topics.

This solves my problem partially. The dropdown list now shows extensions. But when I select an option it says empty in the box. Except for the dashboard extension. That one seems to be normally functioning.

If anybody has clues... please tell me, I'm out of options here