Problem to connect Lorhammer to Chirpstack

I want to connect Lorhammer to Chirpstack
The chirpstack MQTT is on port 1883
But the Lorhammer is on port 1884
I want to to connect Lorhammer to chirpstack with this order :
./build/orchestrator -mqtt tcp://127.0.0.1:1883 -from-file “./resources/scenarios/scenario.json”
the file scenario.json have all gateway address and device address
But I can not and I have this error on Lorhammer :

And also this ERORR in the Chirpstack :