I've been having this issue since updating to version 15 of the media encoder, I have today updated to 15.1 to see if the error is fixed. but it is still happening. I am working on a NAS server.
iMac (Retina 5K, 27-inch, 2017)
3.8 GHz Quad-Core Intel Core i5
32 GB 2400 MHz DDR4
Radeon Pro 580 8 GB
Copy link to clipboard
I'm also having the same issue. It worked for a day after I updated to 15.1 and now seems to be having the same issue again.