Images won't upload with Add Media button

I am running a multisite. All of a sudden, I am not able to load images through the Add Media button in the post editor page.

I have tested my other subsites and they work fine. All sites are using the same theme and plugins.

Never had this happen before. Can someone take a look?

I am granting access.

wordsandswriters.com (primary site)

Thanks, Joe.