Can not connect to cnMaestro

hi there,

i am newbie to cnmaestro and try to install it (v5.0.0) into vmware last-night, run apt update && apt ugprade successfully.
at the meanwhile my notebook and vmware with cnmaestro run under NAT with ip private.

than i connect F200 into the same router and put the cnmestro config as follows :
cnmestro url : cnmaestro.my-domain
i got an error log on F200:
Sep 1 00:11:47 DEVICE-AGENT[2733]: SSL_connect Not successful 5
Sep 1 00:11:47 DEVICE-AGENT[2733]: Unable to discover cnMaestro URL (re-discover in 73 seconds)
Sep 1 00:11:47 DEVICE-AGENT[2733]: Attempting (re)connection in 73 seconds

i try to install the ssl cert from menu server - ssl certificates but still no luck. the CN redirect to the hosting provider when it called by doimain name. the cert created from letsencrypt with my valid domain.
the assigned private ip address has been put into the public dns server as well as cnmaestro.my-domain

can anyone point me the clue ?
thank you

update : i success to install the ssl cert on my cnmaestro premises as i create *.my-domain from letsencrypt.and put it on menu server - ssl certificates - import.

so i can call https://cnmaestro.my-domain without any security warning, but the F200 still fail to connect to :
Sep 1 00:00:17 test unit snmpd[2288]: DFS status: N/A
Sep 1 00:00:23 test unit DEVICE-AGENT[2635]: Attempting (re)connection in 5 seconds
Sep 1 00:00:30 test unit DEVICE-AGENT[2635]: SSL_connect Not successful 1
Sep 1 00:00:30 test unit DEVICE-AGENT[2635]: Unable to discover cnMaestro URL (re-discover in 61 seconds)
Sep 1 00:00:30 test unit DEVICE-AGENT[2635]: Attempting (re)connection in 61 seconds

the tool ping show that i can ping cnmaestro.my-domain
PING cnmaestro.my-domain (192.168.28.10) 32(60) bytes of data.
40 bytes from cnmaestro.my-domain (192.168.28.10): icmp_seq=1 ttl=64 time=0.549 ms
40 bytes from cnmaestro.my-domain (192.168.28.10): icmp_seq=2 ttl=64 time=0.727 ms
40 bytes from cnmaestro.my-domain (192.168.28.10): icmp_seq=3 ttl=64 time=0.566 ms
40 bytes from cnmaestro.my-domain (192.168.28.10): icmp_seq=4 ttl=64 time=0.517 ms

— cnmaestro.my-domain ping statistics —
4 packets transmitted, 4 received, 0% packet loss, time 3003ms
rtt min/avg/max/mdev = 0.517/0.589/0.727/0.086 ms

any clues ?

hello,

problem solve with upgrade the firmware into the latest one

P