I created the file a few weeks ago, and everything was working perfectly. The rendering went smoothly, and the video of 25 seconds played in full. However, today it suddenly posed a problem with that same project file.
I've ensured there is enough disk space and tried using both local and external drives. I've repeatedly rendered the workspace and the full sequence, but the problem persists.
The rendered video does not play in full.
It is the same problem in both in the "normal" and beta version.
What triggers this sudden problem?