After creating a video with timeline in Photoshop 21.1, when I try to Export > Render Video, the Progress bar pops up and says "Initializing Video Export" but never finishes, and I never get the pop up window to select where the file goes.
Hi, same problem with PS 21.1 an Mojave - I found this solution: I always have a second (not used) admin identity on my mac - I started with this account - and PS video rendering worked. Copied all (new) adobe preferences from the user library folder. Back to my account, deleted the adobe preferences (user library) and took the new one from the (not used) admin account. Now rendering works . Don ́t know which file of the prefernces has caused the problem - but now it ́s running. Maybe this helps someone ... (first I saved the old preferences in case of other problems ... and then i deleted it ...)