[FP4] unable to connect to Fritz-box 7590 VPN - “connecting …”

• /e/ version: 2.6.3-u-20241217455359-official-FP4
• Device model(s): fairphone4
• Developer mode enabled: yes
• Device rooted: no
• Trackers blocker enabled: no

Summary

After the last update (2.6.3-u-20241217455359-official-FP4) my Fairphone 4 can not longer connect to my Fritz-box 7590 VPN The previous version worked fine, and my Fritz-box still accepts connections from another phone, so my conclusion is clear.

The connection type is ‘IPSec’ or ‘IPSec Xauth PSK’ . With a shared secret, an username and a password.

The problem

What is the current behavior?

unable to connect to Fritz-box 7590 VPN - “connecting …”

What is the expected correct behavior?

to be able to connect to Fritz-box 7590 VPN