https://www.ibm.com/support/pages/sql1768n-unable-start-hadr-reason-code-7-occurs-while-initializing-high-availability-disaster-recovery-hadr
SQL1768N Unable to start HADR, Reason Code 7 occurs while initializing high availability disaster...
"SQL1768N Unable to start HADR, Reason Code = 7" occurs while initializing high availability disaster recovery (HADR).