From my experience, don't syn the DNS while having the IPv6 Networ Enabled in Cloudron if no AAAA records in apps or domain

I don't know if it happens to anyone else using the Cloudron version 8.x but since I set my networks both work with IPv4 and 6, and it seems everything works normal

When one of those errors occur, can you look into the box logs ? /home/yellowtent/platformdata/logs/box.log . That will give more concrete information of what the error is. It's not able to reach the appstore but this could be because of a number of reasons.

Does -6 work?

curl -6 -v https://ipv6.api.cloudron.io/api/v1/helper/public_ip

and here what i got

Trying 165.227.67.76:443...
*   Trying 2604:a880:800:10::b66:f001:443...
* Immediate connect fail for 2604:a880:800:10::b66:f001: Network is unreachable
* Connected to api.cloudron.io (165.227.67.76) port 443 (#0)
* ALPN, offering h2
* ALPN, offering http/1.1
*  CAfile: /etc/ssl/certs/ca-certificates.crt
*  CApath: /etc/ssl/certs
* TLSv1.0 (OUT), TLS header, Certificate Status (22):
* TLSv1.3 (OUT), TLS handshake, Client hello (1):
* TLSv1.2 (IN), TLS header, Certificate Status (22):
* TLSv1.3 (IN), TLS handshake, Server hello (2):
* TLSv1.2 (IN), TLS header, Certificate Status (22):
* TLSv1.2 (IN), TLS handshake, Certificate (11):
* TLSv1.2 (IN), TLS header, Certificate Status (22):
* TLSv1.2 (IN), TLS handshake, Server key exchange (12):
* TLSv1.2 (IN), TLS header, Certificate Status (22):
* TLSv1.2 (IN), TLS handshake, Server finished (14):
* TLSv1.2 (OUT), TLS header, Certificate Status (22):
* TLSv1.2 (OUT), TLS handshake, Client key exchange (16):
* TLSv1.2 (OUT), TLS header, Finished (20):
* TLSv1.2 (OUT), TLS change cipher, Change cipher spec (1):
* TLSv1.2 (OUT), TLS header, Certificate Status (22):
* TLSv1.2 (OUT), TLS handshake, Finished (20):
* TLSv1.2 (IN), TLS header, Finished (20):
* TLSv1.2 (IN), TLS header, Certificate Status (22):
* TLSv1.2 (IN), TLS handshake, Finished (20):
* SSL connection using TLSv1.2 / ECDHE-RSA-AES256-GCM-SHA384
* ALPN, server accepted to use http/1.1
* Server certificate:
*  subject: CN=api.cloudron.io
*  start date: Jul  1 01:05:20 2024 GMT
*  expire date: Sep 29 01:05:19 2024 GMT
*  subjectAltName: host "api.cloudron.io" matched cert's "api.cloudron.io"
*  issuer: C=US; O=Let's Encrypt; CN=R11
*  SSL certificate verify ok.
* TLSv1.2 (OUT), TLS header, Supplemental data (23):
> GET /api/v1/apps/com.openwebui.cloudronapp/versions/2.3.10/icon HTTP/1.1
> Host: api.cloudron.io
> User-Agent: curl/7.81.0
> Accept: */*
> 
* TLSv1.2 (IN), TLS header, Supplemental data (23):
* Mark bundle as not supporting multiuse
< HTTP/1.1 200 OK
< Server: nginx/1.18.0 (Ubuntu)
< Date: Sun, 11 Aug 2024 13:22:18 GMT
< Content-Type: image/png
< Content-Length: 6161
< Connection: keep-alive
< X-Powered-By: Express
< Cache-Control: public, max-age=604800, immutable
< ETag: 283fc22575da37e1782df9a9be3a00c0
< 
Warning: Binary output can mess up your terminal. Use "--output -" to tell 
Warning: curl to output it to your terminal anyway, or consider "--output 
Warning: <FILE>" to save to a file.
* Failure writing output to destination
* Closing connection 0
* TLSv1.2 (OUT), TLS header, Unknown (21):
* TLSv1.2 (OUT), TLS alert, close notify (256):