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Hi Team,
I am getting an error RequestEntityTooLarge while posting a message to MS Teams Channel.
Action: 'Post_message_in_a_chat_or_channel' failed
Error Detail: The response is not in a JSON format.
@Anonymous
There is a maximum message size in power automate to post messages in MS Teams channel.
Your messages, adaptive cards can not be larger than 28kb approximate for a single message. That's why you encounter this error. I guess your message is just too large.
Only available fix would be reducing the size, remove unnecessary things if you can or split it into multiple messages.
Cheers,
Ankesh
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