Lost LoRaWAN connection

The gateway does not connect anymore with the lorawan sensors.

The Gateway is connected via wifi.

Normally the sensors will send the data to the gateway.
And the gateway will send the data to the database in AWS.
The gateway is still connected to the wifi, but it does not send any data through.
The led on the gateway for lora is also off.

What is a long term solution as the gateways are remotely operated?
Restarting the gateways is therefore not a viable option.