"Subdomain not found"

[Farmy]

"Subdomain not found"

[ksaye]

I am attempting the Learn module: https://docs.microsoft.com/en-us/learn/modules/develop-with-azure-digital-twins/route-output-from-azure-digital-twins-to-downstream-services/3-exercise-build-simulate-chocolate-factory-twin and I am getting the same issue:

[ksaye]

So in my case the Environment Variable for the Azure Function was wrong. Changing this value and restarting the Azure function worked for me. Seems to be a problem with the ARM template? Shown below, it defaulted to West US 2 yet I deployed in south central US.

[akiskips]

I came across this issue too, this seems to be a known issue when the user account belongs to a different Azure AD tenant from the DT instance.
In the troubleshoot page of the Docs there are two solutions described:

https://docs.microsoft.com/en-us/azure/digital-twins/troubleshoot-error-404

[Satya-Kolluri]

This is a known issue, troubleshoot docs has two possible solutions provided for this issue.

Refer the troubleshoot page.