Media Gallery Images not Visible

Hi,

My media gallery is not displaying the images that are already uploaded, When I choose “add media” the “insert media” pops up comes but it is completely blank. The images are on the server but I cannot see them through the media gallery. It’s very weird. I disabled plugins and tried that process of elimination but I got nothing.

Same thing happens with the “set featured image” Any Ideas? I look through the forum but did not find an answer.

Any help would be greatly appreciated.

Thanks!