failed to verify certificate

[wldcld]

Hi,

I installed the App on the Miyoo Mini Plus, latest stable version of both. I am able to access the web Interface. I tried adding a device that is outside of my network and I can't get them to connect to each other. Other devices are working fine the same way. I checked the logs, when the syncthing on the Miyoo tries to use the syncthing relay server it displays a certificate error. It seems to me as if it can not check the certificate presented by the relay server.

2025-01-05 17:58:08 quic://0.0.0.0:22000 detected NAT type: Port restricted NAT
2025-01-05 17:58:08 quic://0.0.0.0:22000 resolved external address quic://87.123.104.237:22000 (via stun.syncthing.net:3478)
2025-01-05 17:59:07 Relay listener (dynamic+https://relays.syncthing.net/endpoint) starting
2025-01-05 17:59:07 Relay listener (dynamic+https://relays.syncthing.net/endpoint) shutting down
2025-01-05 17:59:07 listenerSupervisor@dynamic+https://relays.syncthing.net/endpoint: service dynamic+https://relays.syncthing.net/endpoint failed: Get "https://relays.syncthing.net/endpoint": tls: failed to verify certificate: x509: certificate signed by unknown authority

Is there a fix for this?
Cheers, Stefan