Failed to cast media BUT works fine! Just logs error

Hi Guys,
I am using Node-red to call service to play an MP3 on my Google Home Mini! everything is working fine for a month, however, everytime I cast something I notice HA is logging an error:

* Failed to cast media https://www.home-assistant.io/images/cast/splash.png. Please make sure the URL is: Reachable from the cast device and either a publicly resolvable hostname or an IP address
* Failed to cast media http://xyz.com/xyz.mp3. Please make sure the URL is: Reachable from the cast device and either a publicly resolvable hostname or an IP address

Should I just ignore these logs? as mentioned everything is working fine !!!