Start rgw service failed with error "failed to fetch mon config"

Issue

• Start rgw service failed with error "failed to fetch mon config":

Jan 15 10:13:57 rgw01 systemd[1]: ceph-radosgw@rgw.rgw01.rgw0.service: Main process exited, code=exited, status=1/FAILURE
Jan 15 10:13:57 rgw01 systemd[1]: ceph-radosgw@rgw.rgw01.rgw0.service: Failed with result 'exit-code'.
Jan 15 10:13:57 rgw01 systemd[1]: ceph-radosgw@rgw.rgw01.rgw0.service: Service RestartSec=100ms expired, scheduling restart.
Jan 15 10:13:57 rgw01 systemd[1]: ceph-radosgw@rgw.rgw01.rgw0.service: Scheduled restart job, restart counter is at 3.
Jan 15 10:13:57 rgw01 systemd[1]: Stopped Ceph rados gateway.
Jan 15 10:13:57 rgw01 systemd[1]: Started Ceph rados gateway.
Jan 15 10:13:58 rgw01 radosgw[24089]: 2023-01-15 10:13:58.038 7f6fe2053700 -1 monclient(hunting): handle_auth_bad_method server allowed_methods [2] but i only support [2]
Jan 15 10:13:58 rgw01 radosgw[24089]: 2023-01-15 10:13:58.038 7f6fe3055700 -1 monclient(hunting): handle_auth_bad_method server allowed_methods [2] but i only support [2]
Jan 15 10:13:58 rgw01 radosgw[24089]: 2023-01-15 10:13:58.038 7f6fe2854700 -1 monclient(hunting): handle_auth_bad_method server allowed_methods [2] but i only support [2]
Jan 15 10:13:58 rgw01 radosgw[24089]: failed to fetch mon config (--no-mon-config to skip)
Jan 15 10:13:58 rgw01 systemd[1]: ceph-radosgw@rgw.rgw01.rgw0.service: Main process exited, code=exited, status=1/FAILURE
Jan 15 10:13:58 rgw01 systemd[1]: ceph-radosgw@rgw.rgw01.rgw0.service: Failed with result 'exit-code'.
Jan 15 10:13:58 rgw01 systemd[1]: ceph-radosgw@rgw.rgw01.rgw0.service: Service RestartSec=100ms expired, scheduling restart.
Jan 15 10:13:58 rgw01 systemd[1]: ceph-radosgw@rgw.rgw01.rgw0.service: Scheduled restart job, restart counter is at 4.
Jan 15 10:13:58 rgw01 systemd[1]: Stopped Ceph rados gateway.
Jan 15 10:13:58 rgw01 systemd[1]: Started Ceph rados gateway.
Jan 15 10:13:58 rgw01 radosgw[24103]: 2023-01-15 10:13:58.555 7fecbd636700 -1 monclient(hunting): handle_auth_bad_method server allowed_methods [2] but i only support [2]
Jan 15 10:13:58 rgw01 radosgw[24103]: 2023-01-15 10:13:58.555 7fecbc634700 -1 monclient(hunting): handle_auth_bad_method server allowed_methods [2] but i only support [2]
Jan 15 10:13:58 rgw01 radosgw[24103]: 2023-01-15 10:13:58.556 7fecbce35700 -1 monclient(hunting): handle_auth_bad_method server allowed_methods [2] but i only support [2]
Jan 15 10:13:58 rgw01 radosgw[24103]: failed to fetch mon config (--no-mon-config to skip)