Continue to get error message that states "no audio streams available for source". I have uninstalled and reinstalled the app, updated, etc.
Yes, fix is in the works... look for version v1.0.26 posting shortly
Currently with the version v1.0.26 that you can get from this link:
https://github.com/UpAllNite-Software/simple-song-collector/releases/download/v1.0.26/ssc-1.0.26.apk
I am able to download from both videos and youtube music songs and I have not received other reports of failure and I usually do if there is a systematic problem.
If you have verified that version is the one you downloaded, deleted any old version, and installed that one, then Youtube probably doesn't like the network address you are using and has flagged it as a bot. If you are using a vpn then try disconnecting that. If you are on a home wifi, you might try rebooting the modem to see if you can get a different address.