Graph is not loading with "header_provider"

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Description

in google-adk==1.17.0 and 1.18.0 , I am able to pass dynamic header or token using header_provider to MCP. And it is working as expected when calling /run or /run_sse endpoints. Able to connect to MCP server for this operations.

But in web UI, "Graph", it is showing internal server error, seems showing error for MCP authentication.

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