I've recently upgraded to C.5.5.1 and since then I have been unable to upload any video files using file manager. Here are a few of the errors that I receive: in dashboard, when I click the box next to the browse button, I am redirected to a folder on my hard drive, i tried uploading the files using "upload multiple" and I get an I/O error, and when I hit the upload button, I get "invalid file" in a pink box with the header of that box reading: "upload error". Please help.