Beta is latest, from here (2026-04-09), removing extra I2–I5 entries helped to import the configuration.
But with this configuration, I see an infinite "connecting" status, while using the same configuration file in another software - the connection is established without problems and immediately.
We tested locally using the AXT1800 v4.8.4 beta version with the same WireGuard configuration (except for the server address, private key, and public key), and it was able to connect normally without any issues.
We found that the backend setting route_policy.global.enabled on the router was disabled, which caused the VPN to not function properly. After re-enabling it, the VPN is now able to connect normally.
I did not change these parameters manually absolutely, and did not import the settings from LuCI, but I guess how this could happen - I restored the router from u-boot mode after an incorrect update attempt, maybe something went wrong in this process?
One way or another - you helped, now everything works fine!