Hey, nice that you get this to work again Credits goes out to @alfredb
Out of curiosity i did a search for this oc_appconfig here and found an existing FAQ which describes this method in addition to the occ command.
@alfredb What do you think, does it make sense to directly link to this FAQ if new users are stumbling over the same? At least the “delete folder” method seems to not work anymore in recent versions of ownCloud but the other two could still be useful.
Credits goes out to @alfredb 