I use NordVPN. I have had no problem uploading all manner of files w the vpn active. But when I tried to upload an mp4 I got an error msg & the upload failed. But when I turned off the VPN, the upload worked. I checked with my host and their servers do not restrict such uploads. Also, the file sizes were small (3-5mb). Is this caused by the vpn itself? Or a conflict between the WP and VPN? And why particularly with mp4s & not with jpgs or pdfs?