I have not used Character Animator much, though it is included in my subscription. This past week or so, I ran updates. While I'm not sure what audio formats were previously supported for pre-recorded audio, but I'm on a Mac and m4a audio isn't supported? Seems like a face-palm moment for the #1 most common audio format on Mac to not be supported. These files are greyed out when selecting "All Supported Formats" and the pulldown only shows AIFF, MP3 and WAV. WTF Adobe?!?!
Version 25.0 Build 46 on MacOS 15.3.1 (MacStudio / Apple M1)