Trouble with Play Track with Chromecast Audio

I have a vision of integrating a white noise track into my bedtime routine. While trying to make this work, I'm stumbling on a seemingly simple step of getting Play Track within my Chromecast Audio Device (a Google Nest Mini) to play anything.

When trying to test a track with the Play Track button, I get the following error: su.litvak.chromecast.api.v2.ChromeCastException: Unable to load media on line 260 (method playTrack)

This seems to be a relatively common error, and I've verified a few common things I've seen in other posts.

  1. The track is small (80kb), and in mp3 format
  2. The track is hosted on gitlab and I'm using the raw format (i.e. pasting it into a browser immediately downloads the file with no additional click)
  3. I am getting the beep alert from the nest mini letting me know its trying to play the track

Any thoughts?

Part two of this is, is there a limit to how big the file can be assuming I can get this to work? In a perfect world I'd have it play a several hour long "rain sounds" track as part of a rule (I understand how to make it attempt to play it through the custom action options)

Hubitat/Chromecast sometimes has problems with DNS resolving...
Have you tried to use the IP address to access the file?
To get the IP address use something like this: https://get-site-ip.com/

I don't know of any realistic limit - IMHO 80 kb is nothing.
You should consider to not play a several hour long sound file, but to repeat an e.g. 5 minutes long file.

My fear with repeating something was that google nest would also repeat the introductory beep letting me know it was going to play something.

Either way, whether I go short and repeated, or long and not repeated, is there any internal storage/memory in the hubitat that I need to worry about filling and/or clearing once in awhile?

Discovered the local memory in hubitat, which solves all my issues. Thanks folks!