Captivate 2019 - publish to video results in all videos showing spinning wheel in final output

I used the video demo option to capture 6 screen recordings (13 total slides in the project). The longest video slide is around 52 seconds. The rest, much shorter. I published using the Video option. All video slides display a spinning wheel in the mp4 output file. I've done this numerous times with Captivate 8 without issue. The project itself and all output files are on my local drive. Any help is appreciated.