i activated the multisite feature in my blog and the most things are working correctly. Except the plugins and the file upload.
In this topic i just want to find a solution for the upload problem. if i try to upload an image i get the following error:
Warning: Invalid argument supplied for foreach() in .../wp-includes/functions.php on line 2365. Dismiss “image.png” has failed to upload due to an error. File type does not meet security guidelines. Try another.
I have allowed to uplaod png files and there is enough space. Someone have an idea what could be wrong?
Thanks in advance!