There was in fact an issue with the scoreblips in the studio, where the file type expected only WAV. This caused an error when I tested it with MP3. I've updated it to fix that--however, you said that you tried all audio formats and it didn't work for you, but WAV should've worked in that scenario. Does the new version 0.4.11 happen to fix it for you? If not, I'll have to try harder to find the cause.