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REST Call from Custom Connector not working whereas it was working fine from last 4 months

Hi Team,


I am facing the issue where i am using Custom Connector to call 3rd Party API. This is "No Authentication" Call and was working fine from last 4 months but now all of a sudden it start throwing 403 error and i could see its adding Authorization in the request which is causing this issue. 


Can someone we please help me to resolve the issue.Attached is the error snaps.




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