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Copilot Studio - Model Context Protocol
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First message always returning SystemError

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Hello there,
 
I noticed that my first message after authenticating always fails with a SystemError. Here is the response I get:

Sorry, something unexpected happened. We’re looking into it. Error code: SystemError. Conversation ID: a:1RqxfBPJLBb3F8oRfPmGq2NFPfp1TD5KvEWQ2EL94Nlv4TjT_ClHQyFYp_UeAX1asYxcBz5cNItd5fWhIbtIA1NRI0q5UtWQYbfQTv8ZlxPEXCezdf54YJ-Ewz59qQBjQ. Time (UTC): 6/26/2025 10:42:25 AM.
 
 
 
I see this happening for anyone who authenticates and uses the Copilot Agent. It appears to only be affecting the first response. Everything after it works:

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