diff --git a/common/transport/lwm2m/src/main/java/org/thingsboard/server/transport/lwm2m/server/DefaultLwM2mTransportService.java b/common/transport/lwm2m/src/main/java/org/thingsboard/server/transport/lwm2m/server/DefaultLwM2mTransportService.java
index 23238a07a5..8f6fe7cdb2 100644
--- a/common/transport/lwm2m/src/main/java/org/thingsboard/server/transport/lwm2m/server/DefaultLwM2mTransportService.java
+++ b/common/transport/lwm2m/src/main/java/org/thingsboard/server/transport/lwm2m/server/DefaultLwM2mTransportService.java
@@ -71,7 +71,7 @@ public class DefaultLwM2mTransportService implements LwM2MTransportService {
 
     private LeshanServer server;
 
-    @AfterStartUp
+    @AfterStartUp(order = Integer.MAX_VALUE - 1)
     public void init() {
         this.server = getLhServer();
         /*
@@ -83,8 +83,8 @@ public class DefaultLwM2mTransportService implements LwM2MTransportService {
          */
         LwM2mTransportCoapResource otaCoapResource = new LwM2mTransportCoapResource(otaPackageDataCache, FIRMWARE_UPDATE_COAP_RESOURCE);
         this.server.coap().getServer().add(otaCoapResource);
-        this.startLhServer();
         this.context.setServer(server);
+        this.startLhServer();
     }
 
     private void startLhServer() {
diff --git a/common/transport/lwm2m/src/main/java/org/thingsboard/server/transport/lwm2m/server/rpc/RpcDownlinkRequestCallbackProxy.java b/common/transport/lwm2m/src/main/java/org/thingsboard/server/transport/lwm2m/server/rpc/RpcDownlinkRequestCallbackProxy.java
index a31c132744..c26ef2c327 100644
--- a/common/transport/lwm2m/src/main/java/org/thingsboard/server/transport/lwm2m/server/rpc/RpcDownlinkRequestCallbackProxy.java
+++ b/common/transport/lwm2m/src/main/java/org/thingsboard/server/transport/lwm2m/server/rpc/RpcDownlinkRequestCallbackProxy.java
@@ -111,7 +111,11 @@ public abstract class RpcDownlinkRequestCallbackProxy<R, T> implements DownlinkR
     }
 
     protected void sendRpcReplyOnError(Exception e) {
-        reply(LwM2MRpcResponseBody.builder().result(ResponseCode.INTERNAL_SERVER_ERROR.getName()).error(e.getMessage()).build());
+        String error = e.getMessage();
+        if (error == null) {
+            error = e.toString();
+        }
+        reply(LwM2MRpcResponseBody.builder().result(ResponseCode.INTERNAL_SERVER_ERROR.getName()).error(error).build());
     }
 
 }
diff --git a/common/transport/transport-api/src/main/java/org/thingsboard/server/common/transport/service/DefaultTransportService.java b/common/transport/transport-api/src/main/java/org/thingsboard/server/common/transport/service/DefaultTransportService.java
index e4c5f672a9..1ca7d80394 100644
--- a/common/transport/transport-api/src/main/java/org/thingsboard/server/common/transport/service/DefaultTransportService.java
+++ b/common/transport/transport-api/src/main/java/org/thingsboard/server/common/transport/service/DefaultTransportService.java
@@ -91,6 +91,7 @@ import org.thingsboard.server.queue.provider.TbQueueProducerProvider;
 import org.thingsboard.server.queue.provider.TbTransportQueueFactory;
 import org.thingsboard.server.queue.scheduler.SchedulerComponent;
 import org.thingsboard.server.queue.usagestats.TbApiUsageClient;
+import org.thingsboard.server.queue.util.AfterStartUp;
 import org.thingsboard.server.queue.util.TbTransportComponent;
 
 import javax.annotation.PostConstruct;
@@ -227,6 +228,10 @@ public class DefaultTransportService implements TransportService {
         transportNotificationsConsumer.subscribe(Collections.singleton(tpi));
         transportApiRequestTemplate.init();
         mainConsumerExecutor = Executors.newSingleThreadExecutor(ThingsBoardThreadFactory.forName("transport-consumer"));
+    }
+
+    @AfterStartUp
+    private void start() {
         mainConsumerExecutor.execute(() -> {
             while (!stopped) {
                 try {