I prepare a video presentation of the images after each session (portrait). But for a few days, I can create and watch my video in the slideshow module. However, exporting the video no longer works. Do you know what can be done about it?
What versions of Lightroom and OS are you running?
I've tested a few exports here and it's working in 10.1.1. (but Catalina in my case)
I'd suggest the usual, restart LrC, restart the computer, reset preferences, progressively until you see a result.
Also i had to unistall my LRC and than reinstall. Only took about 10 minutes.
I just tried using Catalina and LRC 10.1.1 and same issue. It never exports. It just hangs
I have the same problem Big Sur 11.2.2
I just wish to share my experience with LrC 10.1 and 10.1.1 with macOS 11 Big Sur.
My signature will display some of the specs of my iMac mid 2015 with 27” 5K monitor with a 2GB GPU unit.
I was using LrC 9.x with Catalina just fine and upgraded to LrC when LrC 10.0 was released and all was fine. Of note here is Adobe updated the specs requirements for GPU.
Couple of weeks after the Lightroom upgrade Apple Big Sur was released and I upgraded my system. All was fine with LrC 10. even though my GPU did not meet the “recommend spec” for 27” 5K monitors.
However when I updated to LrC 10.1, I started to get many performance problems in the Develop module. This continued into v 10.1.1 after struggling for a week I eventually reverted LrC 10.0 and things are fine.
Just some thoughts for those having problems with LrC 10.1 and 10.1.1 with Big Sur.
Its best practice to not update when a new major OS is released. If you do you are in essence a beta tester as it takes Apple and other development teams a few release cycles for bugs to be sorted out, prioritzed, fixed and re-released. It's worth noting that Big Sur has problems with many apps not only Adobe apps. I still haven't updated and usually wait for a couple of iterations.
The slideshow module has been flakey for years. Sometimes it will export, sometimes not. There are also other issues.