Await permit join before continuing with startup. https://github.com/Koenkk/zigbee2mqtt/issues/2617

lib/controller.js

@@ -126,7 +126,7 @@ class Controller {
             logger.warn('Set `permit_join` to `false` once you joined all devices.');
         }
 
-        this.zigbee.permitJoin(settings.get().permit_join);
+        await this.zigbee.permitJoin(settings.get().permit_join);
 
         // MQTT
         this.mqtt.on('message', this.onMQTTMessage.bind(this));