Audio.com won't let me upload or delete audio files

I joined [audio.com]to use the Audacity Audio Share function. I loaded 2 versions of a track I’m working on to share with vocalists i’m working with. I deleted them and replaced them with a newer version of the song. NOW it won’t let me delete or upload any more audio files. I get a “failed to delete audio” or “failed to create audio” message. does anyone have any ideas what went wrong and what I can do to upload and delete audio files ?