Downlink URL not found when sending downlink to TTN Class-C device

Downlink URL not found when sending downlink to TTN Class-C device

Hi,

I am using the 'Downlinks using Dashboard' tutorial to send a downlink to a TTN Class-C device but I get a "Downlink URL not found" error.

As far as I can see the URL and the data are correct. What am I missing?

This is the analysis output.

      Downlink analysis started
      Trying to send the downlink
      ------> Downlink URL: https://ttn.middleware.tago.io/downlink
      Downlink failed with status 400
      Downlink URL not found

Kind Regards,

Erwin