Hey Bryanp,
Sorry for the delay in response.
I assume that you are trying the conversion online via web browser- https://cloud.acrobat.com/exportpdf and one the pdf is converted to the word its failing to download?
If this is the case, then you may try the steps suggested below-
1- Clear the cache and cookies or browser or Check with a different web browser and try the conversion.
2- As download is getting failed so it could be connection issue. You may turn the internet security software off for a while and check back.
[Antivirus software can help protect your computer against viruses and other security threats. In most cases, you shouldn't disable your antivirus software. If you have to temporarily disable it to install or activate other software, you should re-enable it as soon as you're done.]
3- For testing purpose, you may check with a different file. As this could be a file specific issue.
4- Check with the latest version of Adobe Reader DC desktop application and see if you get the different result.
Let us know the latest on this.
Regards,
Akanchha