Chrome Cast Sender “session_error” NOT_FOUND

Check these; hopefully they get things sorted out:

  • Make sure you have registered your chromecast device on the developer console. Double check the serial number since sometimes it is hard to read it.

  • During the chromecast setup, there was a box stating something like “Send the serial number ..”, make sure that is checked

  • Wait 1/2 hour or so and reboot your chromecast

  • Check whether you can access http://<chromecast-ip>:9222 from a chrome browser on the same wifi network; if you can, then your device is ready for development

As for the area on the image that you have pointed to, that is more for informational purposes at this point

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