I just upgraded WordPress and the media manager is not working. The media dialog box does not display existing images and whenever I tried to upload a photo, I received the following error:
An error occurred in the upload. Please try again later.
However, when I check the Media Library from the sidebar, I found that the images have uploaded. It just didn't show up in the media dialog box when posting content. How can this be resolved?
Any advice would be helpful. Thanks!