3050526 - SAP authentication fails after BI update from BI 4.2 SP6 to BI 4.3 SP1 Patch 3

After BI update from BI 4.2 SP6 to BI 4.3 SP1 Patch 3, login to CMC / BI Launchpad via SAP authenticatication fails with the following error message:

Account information not recognized: CSecSAPR3Binding :: XRFCCnxBroker :: BorrowConnection () failed. See the following log entries for more information. Error logging on to the SAP system. The following RFC error was reported: [Group, key, message]: [4, "RFC_COMMUNICATION_FAILURE", "LOCATION CPIC (TCP / IP) on local host with Unicode ERROR max no of 200 conversations exceeded 
TIME Tue Apr 20 12:56: 10 2021 
RELEASE 753 
COMPONENT CPIC (TCP / IP) with Unicode
VERSION 3 RC 466 
MODULE D: /depot/bas/753_REL/src/krn/si/cpic/r3cpic.c 
LINE 15868 
COUNTER 2 "]. 
The authorization system has been deactivated in the memory. Possible reasons: The SAP system is not available or the logon data is invalid. The authorization system must be reactivated so that it is available again.

SAP BusinessObjects Business Intelligence platform 4.3

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