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Power Automate
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Power Automate/Workflows Messages Send Failures

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I try to integrate automated messages into my firm's build pipelines.

The messages are sporadically ignored and not sent at all. 

Weirdly enough, I get 202 code for every trial, even the ones that are not shown eventually in my workflows channel.

Here is my Python boilerplate for many different types of messages that I configured: 


```json
    @property
    def payload(self):
        return {
            "type": "message",
            "attachments": [
                {
                    "contentType": "application/vnd.microsoft.card.adaptive",
                    "contentUrl": None,
                    "content": {
                        "$schema": "http://adaptivecards.io/schemas/adaptive-card.json",
                        "type": "AdaptiveCard",
                        "version": "1.2",
                        "body": self.body
                    }
                }
            ]
        }

```

Also, when opening the workflows history I can find few failures with the message: 

> Flow run failed. Action 'Post_card_in_a_chat_or_channel_1' failed: Microsoft.Azure.ProcessSimple.Data.Entities.Exceptions.ProcessSimpleDataException: The specified Teams flowbot adaptive card request is missing or invalid. The tracking Id is '{0}'. ---> AdaptiveCards.AdaptiveSerializationException: Property 'type' must be 'AdaptiveCard' at AdaptiveCards.AdaptiveCardConverter.ReadJson(JsonReader reader, Type objectType, Object existingValue, JsonSerializer serializer) at Newtonsoft.Json.Serialization.JsonSerializerInternalReader.DeserializeConvertable(JsonConverter converter, JsonReader reader, Type objectType, Object existingValue) at Newtonsoft.Json.Serialization.JsonSerializerInternalReader.Deserialize(JsonReader reader, Type objectType, Boolean checkAdditionalContent) at Newtonsoft.Json.JsonSerializer.DeserializeInternal(JsonReader reader, Type objectType) at Newtonsoft.Json.JsonConvert.DeserializeObject(String value, Type type, JsonSerializerSettings settings) …

Things I tried: 

1. different types of message

   ```json
               "type": "AdaptiveCard", #Or message instead
               "attachments": [
                   {
                       "contentType": "application/vnd.microsoft.card.adaptive",
                       "contentUrl": None,
                       "content": {
                           "$schema": "http://adaptivecards.io/schemas/adaptive-card.json",
                           "type": "message", #Or AdaptiveCard instead
   
   ```
   
1. Un-nesting the message

1. increasing the version

1. Generating new URLs 

  
  
Workflows Version 2.6.3

Teams version **26120.3106.4725.800**.

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