You should recheck your Sounds files/blueprints that you have in your project. It looks like you upgraded from an older version of the engine and it caused some trouble with the files.
Once you’ve done that, please upload full error logs again.
It would also be very helpful if you could provide me with full reproduction steps so I can test this out on a sample project here, or provide me with a sample project to review. If you choose to provide me with a sample project, upload it to something like Drive and provide the link to me through a private message on the forums.
Thanks! 