Ok, every time I try to play a part of a song in the program I get this error, the error only appears for less than a second and I had to take a photo of it to read it. How can I solve it or what is the cause?
Make sure to move the entire UTAU folder to another location, such as Documents.
Try using a different voicebank as well, and make sure the format of the lyrics matches the format of the voicebank.