Receiving 400 error code for bad syntax

Google Cloud Apigee
1

Receiving 400 error code for bad syntax - trace details below:

{"ApiErrors":[{"ErrorNumber":999999,ErrorCode":"GLBL,ErrorMessage":"Log on failure.,"ApiErrorTypeCode":2}],"ApiResultTypeCode":2}

https://api-gw-rnd.pncint.net/cib_dcis_rnd_api_testing/Party/:partyIdentifier/PartyPaymentInstruction

Getting on PUT call - GET call is ok…