PXC-8.0.13 startup is failing with unknown variable 'wsrep_sst_auth=root:' error

2019-02-21T18:57:51.972824Z 0 [Warning] [MY-010097] [Server] Insecure configuration for --secure-file-priv: Current value does not restrict location of generated files. Consider setting it to a valid, non-empty path.
2019-02-21T18:57:51.972892Z 0 [System] [MY-010116] [Server] /qa/workdir/pxc80_opt/bin/mysqld (mysqld 8.0.13-3-31.33) starting as process 11346
2019-02-21T18:57:51.977811Z 0 [Warning] [MY-000000] [Server] WSREP: Could not open state file for reading: '/qa/workdir/pxc80_opt/node1//grastate.dat'
2019-02-21T18:57:51.977824Z 0 [Warning] [MY-000000] [Server] WSREP: No persistent state found. Bootstraping with default state
2019-02-21T18:57:52.024990Z 0 [Warning] [MY-000000] [Server] WSREP: Fail to access the file (/qa/workdir/pxc80_opt/node1//gvwstate.dat) error (No such file or directory). It is possible if node is booting for first time or re-booting after a graceful shutdown
2019-02-21T18:57:52.083415Z 0 [Warning] [MY-013245] [Server] The SSL library function CRYPTO_set_mem_functions failed. This is typically caused by the SSL library already being used. As a result the SSL memory allocation will not be instrumented.
2019-02-21T18:57:54.257106Z 0 [Warning] [MY-010068] [Server] CA certificate ca.pem is self signed.
2019-02-21T18:57:54.293645Z 0 [ERROR] [MY-000067] [Server] unknown variable 'wsrep_sst_auth=root:'.
2019-02-21T18:57:54.293665Z 0 [Warning] [MY-010952] [Server] The privilege system failed to initialize correctly. If you have upgraded your server, make sure you're executing mysql_upgrade to correct the issue.
2019-02-21T18:57:54.293728Z 0 [ERROR] [MY-010119] [Server] Aborting