I can't post in Playlist Exchange (Invalid URI/URL)

[breedo]

Plan: Family

Premium

Country: Australia

Device

Both Windows 10 Lenovo Yoga and Macbook Air MacOS Mojave

I can't upload a message into playlist exchange, everytime I attempt to post there, it comes up with "Invalid URI/URL". Even though it loads the playlist and gets ready to post, it then says when you click on post the message above. It sometimes lets me post, but then it has random sets of days where I can't post in that category specifically. I have tried use incognito mode, other browsers and use other internets in completely different places.