Can't upload videos to Twitter with Safari 12
I noticed that I suddenly couldn't upload videos to Twitter. For a while I thought it was a Twitter problem, but today I tried Firefox and Chrome, and had no problem with them. Then I realised it started when I upgraded to Safari 12 (OS 10.13.6). I have empty the cache on Safari but to no avail.
MacBook Pro, macOS High Sierra (10.13.6), MacBook Pro (2011) 16 gig RAM