We know that file issues can be super annoying and are here to help. Sometimes changing your file format from mp3 to wav or re-exporting it from your source program works, but it could be something else.
The best way for us to help is if you send us your file using this link
Please make sure to include a brief description of the problem you are having in the message and be sure to send from you Headliner account email so we can check the logs on our side to get to a quicker resolution.
Hope to have this fixed for you soon!