Soundcloud private embeds not loading with error "You have not provided a valid SoundCloud URL."

I have had a look into this issue. The private URL should have a token at the end similar to s-3M4TCI8FWDC

This forms part of the path and the private track will load correctly if this is included.

@akoepke: I am using a private URLs that contain the secret token as you mentioned. I am hoping you can take another look at this because it is no longer working and this has been in place for years with nothing changed on our end. If you contact me on Drupal slack or through my contact form, I can point you to some non-working examples. Thanks!