Cannot skip WiFi in Google Setup Wizard after Factory Reset

I own a Klipad KL4888 tablet running Android 6.0.1

After a crash, I had to do a factory reset and a wipe cache from the recovery menu.

However, when restarting and running the setupWizard, it asks me a Wifi/GSM, but systematically the message "Can't connect to the internet" appears.

So I went through ADB (the device is unfortunately not pre-rooted), and in the logs I noticed this :

02-28 23:03:25.995 2784 2929 I SetupWizard.CheckConnectionTask: connecting to walled garden server. retries=0

02-28 23:03:26.246 970 1174 D WifiService: acquireWifiLockLockLocked: WifiLock{
NlpWifiLock type=2 binder=android.os.BinderProxy@52836c
}


02-28 23:03:28.123 970 1176 D WifiService: releaseWifiLockLocked: WifiLock{
NlpWifiLock type=2 binder=android.os.BinderProxy@52836c
}


02-28 23:03:36.239 2784 2929 W SetupWizard.CheckConnectionTask: IOException e=java.net.SocketTimeoutException: failed to connect to status.eqoe.cn/185.234.212.233 (port 80) after 10000ms

02-28 23:03:36.239 2784 2929 I SetupWizard.CheckConnectionTask: connecting to walled garden server. retries=1

02-28 23:03:46.301 2784 2929 W SetupWizard.CheckConnectionTask: IOException e=java.net.SocketTimeoutException: failed to connect to status.eqoe.cn/185.234.212.233 (port 80) after 10000ms

02-28 23:03:46.301 2784 2929 I SetupWizard.CheckConnectionTask: connecting to walled garden server. retries=2

02-28 23:03:56.360 2784 2929 W SetupWizard.CheckConnectionTask: IOException e=java.net.SocketTimeoutException: failed to connect to status.eqoe.cn/185.234.212.233 (port 80) after 10000ms

02-28 23:03:56.360 2784 2929 I SetupWizard.CheckConnectionTask: connecting to walled garden server. retries=3

02-28 23:04:06.421 2784 2929 W SetupWizard.CheckConnectionTask: IOException e=java.net.SocketTimeoutException: failed to connect to status.eqoe.cn/185.234.212.233 (port 80) after 10000ms

I also tried to disable Wifi, in order to be able to choose the "Ignore" option but obviously not enough rights.

The problem is that this famous site that is being tested is obviously no longer reachable.
Is there any way to get out of this situation?
An upgrade, but is the hardware compatible?
Modify the Java sources, in order to ping another site?

Thank you !