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rcyber's avatar
rcyber
Resolver I
7 years ago
Solved

Underlying error message:Value cannot be null. Parameter name: uriString

Hello all!   I've developed a custom connector. It is very simple and just shows the 'Hello world!' message. Also I added an OAuth authentification method. And it works fine too in Power BI deskto...
Need Help
  • rcyber's avatar
    rcyber
    7 years ago

    I've found out MS has issued the new version of Gateway.

    I've installed that and my issue is disappeared then.

    So, my connector works fine now and we can close the topic.

     

    Thanks.

Kyle-MSFT's avatar
Kyle-MSFT
Microsoft Employee
4 years ago

Another thing to check if you are getting the "Value cannot be null. Parameter name: uriString" error while creating a gateway connection to a custom data connector. Verify you are using the correct redirect endpoint/URL in your gateway's OAuth flow. It needs to be https://oauth.powerbi.com/views/oauthredirect.html. You can read more information about the redirect URL here in the "OAuth and Power BI" section: https://docs.microsoft.com/en-us/power-query/samples/github/readme