The OCR is not reading the plate number about mcw-serverless-architecture HOT 9 CLOSED

Additional update :
I can see the following error in the function "ProcessImage" logs:
Critical error: No MediaTypeFormatter is available to read an object of type 'OCRResult' from content with media type 'application/octet-stream'.

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@joelhulen @timahenning Sorry guys for bothering you , But do you have any idea what could be the reason for the error up?
I have tried several things but with no luck

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@eaelmoneem1 Sorry, I was away on vacation. Cold you please tell me what the value of your computerVisionApiUrl app setting is?

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Hi @joelhulen NP, thanks for looking into this.
The value for computerVisionApiUrl is: https://tollboothvisioninitlab.cognitiveservices.azure.com/vision/v2.0/ocr added in the Azure function

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Thank you. When you look at your other App Settings, do you see the indicator that shows that the Key Vault reference was successfully retrieved? This will be for computerVisionApiKey, eventGridTopicKey, cosmosDBAuthorizationKey, and blobStorageConnection.

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I'm not sure exactly from where I can see this, But I think that all the connections are correct because I have modified this part manually and removed the else condition. Just to test that the event for "savePlateData" is working fine, and I was able to see data in CosmosDB "Processed" document but again with empty "licensePlateText" :

if (data.LicensePlateFound)
{
// TODO 3: Modify send method to include the proper eventType name value for saving plate data.
await Send("savePlateData", "TollBooth/CustomerService", data);
}
else
{
// TODO 4: Modify send method to include the proper eventType name value for queuing plate for manual review.
await Send("queuePlateForManualCheckup", "TollBooth/CustomerService", data);
}

and when i check the Function logs in the portal i see this logs for each file:

2020-09-16 12:13:52.738
Executing 'ProcessImage' (Reason='EventGrid trigger fired at 2020-09-16T12:13:51.5869921+00:00', Id=8607afca-fbcf-481c-b8cc-b93d738f007f)
Information

2020-09-16 12:13:53.011
Processing XVK7CDMI.jpg
Information

2020-09-16 12:13:53.196
Making OCR request
Information

2020-09-16 12:13:53.456
Critical error: No MediaTypeFormatter is available to read an object of type 'OCRResult' from content with media type 'application/octet-stream'.
Critical

2020-09-16 12:13:53.462
Finished OCR request. Result:
Information

2020-09-16 12:13:53.475
Sending license plate data to the queuePlateForManualCheckup Event Grid type
Information

2020-09-16 12:13:53.574
Sent the following to the Event Grid topic: TollBooth.Models.Event`1[TollBooth.Models.LicensePlateData]
Information

2020-09-16 12:13:53.575
Finished processing. Detected the following license plate:
Information

2020-09-16 12:13:53.604
Executed 'ProcessImage' (Succeeded, Id=8607afca-fbcf-481c-b8cc-b93d738f007f, Duration=2016ms)

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Can you please update the GetImageHttpContent method of the FindLicensePlateText.cs file (https://github.com/microsoft/MCW-Serverless-architecture/blob/master/Hands-on%20lab/starter/TollBooth/TollBooth/FindLicensePlateText.cs#L103) by replacing content.Headers.ContentType = new MediaTypeHeaderValue("application/octet-stream"); with content.Headers.ContentType = new MediaTypeHeaderValue("application/json"); or text/plain if that doesn't work?

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This is strange, I deleted the function from the portal and then I made the changes and published it.
But I keep receiving the same error :
Critical error: No MediaTypeFormatter is available to read an object of type 'OCRResult' from content with media type 'application/octet-stream'.

I have tried (application/json) & (text/plain)

@joelhulen Do you have any idea what else could cause this error in the code if it's not the HeaderValue?

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The issue has been resolved. The problem was in one of the KeyVault keys.
Thanks for your help

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