No addon install possible

Installation
1

Hello,
I use homeassistant on a raspberry pi4.
I have installed the latest version of ha. In addition, Hacs is also installed. Recently no addon can be installed.
It does not matter if an official one or one from hacs. I click on install but nothing happens.
Can someone help me further. Log spits out nothing unusual.

ha resolution info
checks:
- enabled: true
  slug: core_security
- enabled: true
  slug: addon_pwned
- enabled: true
  slug: network_interface_ipv4
- enabled: true
  slug: dns_server_ipv6
- enabled: true
  slug: supervisor_trust
- enabled: true
  slug: dns_server
- enabled: true
  slug: free_space
- enabled: true
  slug: backups
issues: []
suggestions: []
unhealthy: []
unsupported: []
2

Have the same issue but on a docker instance on a VM.
No addon’s are possible or HACS updates, but upgrade of “officiall” addons seems to work for some strange reason.

3

Doh!

Turned out that there was a IPV6 issue.
Since I don’t use it for this machine, I just turned it off and everything started to work great again.