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jchong_netbase's avatar
jchong_netbase
Copper Contributor
Jul 23, 2019

Incoming Webhooks stopped working?

We just noticed that the incoming webhooks feature broke sometime around 07/23 12:50am UTC. The webhook returns with HTTP 200 OK, and the only error message is a .NET exception message without the stack trace. Is there a schema change recently that is being rolled out?

 

Oddly, this only affected half of our configured webhooks. Newly created webhooks function normally.

 

$ httpie --json -v POST $url 'text=This is a test.'
POST <redacted> HTTP/1.1
Accept: application/json, */*
Accept-Encoding: gzip, deflate
Connection: keep-alive
Content-Length: 111
Content-Type: application/json
Host: outlook.office.com
User-Agent: HTTPie/1.0.2

{
"text": "This is a test."
}

HTTP/1.1 200 OK
Cache-Control: no-cache
Content-Encoding: gzip
Content-Type: text/plain; charset=utf-8
Date: Tue, 23 Jul 2019 05:54:04 GMT
Expires: -1
Pragma: no-cache
Transfer-Encoding: chunked
Vary: Accept-Encoding
X-AspNet-Version: 4.0.30319
X-BEServer: CY4PR17MB0949
X-BackEndHttpStatus: 200
X-BackEndHttpStatus: 200
X-CafeServer: CY4PR13CA0042.NAMPRD13.PROD.OUTLOOK.COM
X-CalculatedBETarget: CY4PR17MB0949.namprd17.prod.outlook.com
X-CalculatedFETarget: CY4PR13CU002.internal.outlook.com
X-FEProxyInfo: CY4PR13CA0042.NAMPRD13.PROD.OUTLOOK.COM
X-FEServer: CY4PR13CA0042
X-FEServer: HK2PR02CA0141
X-MSEdge-Ref: Ref A: 46BA11E2F05D4765AAE6D7854B45323B Ref B: TPE30EDGE0217 Ref C: 2019-07-23T05:54:05Z
X-Powered-By: ASP.NET
X-RUM-Validated: 1
request-id: 19c4e43f-6d27-4e2d-a5c1-75cc15f6b6ba

System.Reflection.ReflectionTypeLoadException: Unable to load one or more of the requested types. Retrieve the LoaderExceptions property for more information

 

microsoft teams

14 Replies

  • EduDom's avatar
    EduDom
    Copper Contributor
    Oct 08, 2019
    I have de same problem from 10/04/2019 but only happen with one webhook
    • rgcejudo's avatar
      rgcejudo
      Copper Contributor
      Oct 08, 2019
      I have the same problem from 07/10/2019 just with one team/channel
    • MattShields74's avatar
      MattShields74
      Copper Contributor
      Aug 12, 2019

      Ines_Trenz_HIRSCHTEC After digging around it looks like Incoming Webhook (and all apps) are added to the account level O365 blacklist.  I logged into the Office admin -> Admin Centers -> Teams -> Teams Apps -> Permission Policies -> Org-wide app settings -> Blocked apps, and click X on the Incoming Webhook.  After this I needed to wait ~2-4 hours.  It seemed that some channel webhook's were quicker to come back than others.

      • tmorell's avatar
        tmorell
        Copper Contributor
        Oct 07, 2019

        I have checked the Org-wide app settings and there are no blocked apps. 

        Webhooks were working properly until 10/04/2019 and just noticed that they are not working today 10/07/2019.

        The POST request returns 200 OK, but with the following message: System.Reflection.ReflectionTypeLoadException: Unable to load one or more of the requested types. Retrieve the LoaderExceptions property for more information.

         

        Thanks!

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