NAS542 - Unable to connect to myZyxelCloud

ablalacapra

I'm running a NAS542, V5.21(ABAG.15) and i ping correctly in Network Diagnosis and the router is detected as UPNP.
I read the cloudagent.log and found this error:

[2024/10/16-12:39:36] pair status checking: "NON-PAIRED" and no cloud user exists, do nothing
[2024/10/16-12:39:37] connection disconnected: Error: 15 Reason: SSL peer presented an invalid certificate
[2024/10/16-12:39:37] re-connect delay time: 39958 ms
[2024/10/16-12:40:53] RESTFUL: device register success, and http code is 200
[2024/10/16-12:40:53] agent reconnect: restful success
[2024/10/16-12:40:53] sync pair status "NON_PAIRED"
[2024/10/16-12:40:55] NAT type detect:5, Hairping:0 [52.5.137.202]
[2024/10/16-12:40:55] pair status checking: "NON-PAIRED" and no cloud user exists, do nothing
[2024/10/16-12:40:55] re-connecting...

What can i do?

Thanks, Ivano