I need to upload a file on the mediawiki installation on my server. When I try to upload a text file I see the following error:
Could not create directory "mwstore://local-backend/local-public/7/78"
The file uploaded is a plain text file encoded in ascii, however this happens with any kind of file like images and pdfs. Another curious thing is: there are attached files in other articles. I think this is caused by a bad configuration parameter or to some read-write access problem, but I couldn't find the exact cause.