exporting issue

Hello. 

I am trying to export photos from lightroom classic.    I have the photos I want to go out flagged.  I select flagged photos and then export to the folder I want them to head into.   The bar at the top that shows progress says exporting 115 photos and then immediatly fills up as though it has finished the export.  The photos are not exporting.  If I do them individually they will export, but i dont have all night and the time to export the photos individually.   No corrupt files.  No damaged files or deleted files. 

Is this happening to anyone else on here?  I am trying to get my wedding out by tonight and I am raging over it not happening.

Any advice on what I can do?   I use windows.  I am also not the most tech savvy person.

[moved from bugs to discussions according to the community rules - Mod.]