Why does Gateway Timeout occur when calling Graph API?

Question

The below graph endpoint is used to check channel access by userprincipalName

GET- https://graph.microsoft.com/v1.0/teams/{teasmId}/channels/{channerId}/doesUserHaveAccess(userPrincipalName='******@consco.com')

(https://learn.microsoft.com/en-us/graph/api/section-get?view=graph-rest-1.0&tabs=http)

We are getting 504 Gateway timeout with Error code UnknownError.

Attach is capture image.