Hi @Ranga Raj
As per the error messages it looks like your request is getting time out in between flow and Graph. So, I will suggest you increase your flow time out. Also, to confirm whether the issue is with flow or Graph API you can use Postman to check whether Graph API is getting time out or not.
Please refer to this documentation to configure your postman with Graph
or
to generate token, refer to this documentation and check if you are facing same issue.
Hope this helps.
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