Code error 4600 message : You are using unsupported lower version of TLS. Kindly upgrade to TLSv1.2 or above

Code error 4600 message : You are using unsupported lower version of TLS. Kindly upgrade to TLSv1.2 or above

PDF document emailed via an API is being generated with the following error message:

{"response": {"uri": "/ recruit / private / json / Candidates / downloadFile", "error": {"code": 4600, "message": " to TLSv1.2 or above "}}}

It has been verified that TLS is updated in version 1.3