Premier Elements 2024

I have tried several times to Export and Share a video using 'Quick Export' to create an mp4 file that I can then use to burn a DVD.  Every time I try this I now get a message at 100% saying that there is an EXPORT ERROR OK.  What am I doing wrong please?  I might add that I have successfully completed this task on a previous project on the same PC.

Thanls

Peter