Error: "We’ve interrupted your sharing activity because your files might contain phishing content."

I received the error before on PDFs, I believe, but never on videos or images. It only started that day. I just tested it now and initially thought it was working because it displayed a dialog box to enter an email to share, but after adding an email and clicking Share File, I got the same error again. If I click Create and copy link, I get a similar error, "Error in call to API function /2/sharing/alpha/create_shared_link_with_settings:"

I never received any email from Dropbox like the error indicates. As it stands, Dropbox is nothing more than a file storage service since I can't share files with others.