I apologize, I’m a complete newbie with this.
I’m using TrueNAS + Tailscale + NextCloud for my family.
Everything works fine with Android.
But with iPhones, some connect normally,
and some experience the issue shown in the image.
Unfortunatelly you did ignore to fill the Support Template in your posting, so we don’t know anything about your setup.
Additionally there are any infoamation missing about your SSL config on your server (Letsencrypt, self-signed certificate…)
Thank you for your feedback.
I’ve solved the problem, which was very simple: just enter the domain in the Host field.
For example,
truenas>apps>nextcloud>edit>Host “truenas-scale.test-example.ts.net:3003”.
and
tailscale admin console : DNS> MagicDNS,HTTPS Certificates enable
Otherwise, I didn’t configure anything else, just followed the normal steps.