TTN cant receive any messages

Hi,

Im using stm32L series and Rfm95.
Region EU868 SF12 BW:125

Device send Join messages succesfully.
I uploaded below TTN live data messages.


But cant receive any join accept messages. I assume TTN does not send downlink messages to endnode.
image

Sometimes TTN shows this message
image

{
  "name": "ns.down.join.schedule.fail",
  "time": "2024-09-12T12:09:46.816533348Z",
  "identifiers": [
    {
      "device_ids": {
        "device_id": "otaa-classc",
        "application_ids": {
          "application_id": "link-api-key"
        },
        "dev_eui": "70B3D57ED80033A5",
        "join_eui": "0000000000000000"
      }
    }
  ],
  "data": {
    "@type": "type.googleapis.com/ttn.lorawan.v3.ErrorDetails",
    "namespace": "pkg/gatewayserver",
    "name": "schedule",
    "message_format": "schedule",
    "correlation_id": "88426195a2c2446fb9cfc198cae99a7b",
    "code": 10,
    "details": [
      {
        "@type": "type.googleapis.com/ttn.lorawan.v3.ScheduleDownlinkErrorDetails",
        "path_errors": [
          {
            "namespace": "pkg/gatewayserver",
            "name": "schedule_path",
            "message_format": "schedule on path `{gateway_uid}`",
            "attributes": {
              "gateway_uid": "milesightug67@dvd"
            },
            "correlation_id": "4d6f482117424af384af14ca08d9ebef",
            "cause": {
              "namespace": "pkg/gatewayserver/io",
              "name": "tx_schedule",
              "message_format": "schedule",
              "correlation_id": "223dde2978f548b1ab0c20d7ce2aaea5",
              "code": 10,
              "details": [
                {
                  "@type": "type.googleapis.com/ttn.lorawan.v3.ScheduleDownlinkErrorDetails",
                  "path_errors": [
                    {
                      "namespace": "pkg/gatewayserver/io",
                      "name": "rx_window_schedule",
                      "message_format": "schedule in Rx window `{window}` failed",
                      "attributes": {
                        "window": 1
                      },
                      "correlation_id": "ce310dc47a564db89c06499aa8313a08",
                      "cause": {
                        "namespace": "pkg/gatewayserver/scheduling",
                        "name": "blocked",
                        "message_format": "sub band is blocked for `{duration}`",
                        "attributes": {
                          "duration": "46.498205s"
                        },
                        "correlation_id": "6c36aaaffff34c15a0f89b3ef5150858",
                        "code": 8
                      },
                      "code": 8
                    },
                    {
                      "namespace": "pkg/gatewayserver/io",
                      "name": "rx_window_schedule",
                      "message_format": "schedule in Rx window `{window}` failed",
                      "attributes": {
                        "window": 2
                      },
                      "correlation_id": "a6961648e0af4acaa45ff422404533de",
                      "cause": {
                        "namespace": "pkg/gatewayserver/scheduling",
                        "name": "blocked",
                        "message_format": "sub band is blocked for `{duration}`",
                        "attributes": {
                          "duration": "6.690829s"
                        },
                        "correlation_id": "9471c776018145afa19d5993029b83cf",
                        "code": 8
                      },
                      "code": 8
                    }
                  ]
                }
              ]
            },
            "code": 10,
            "details": [
              {
                "@type": "type.googleapis.com/ttn.lorawan.v3.ScheduleDownlinkErrorDetails",
                "path_errors": [
                  {
                    "namespace": "pkg/gatewayserver/io",
                    "name": "rx_window_schedule",
                    "message_format": "schedule in Rx window `{window}` failed",
                    "attributes": {
                      "window": 1
                    },
                    "correlation_id": "ce310dc47a564db89c06499aa8313a08",
                    "cause": {
                      "namespace": "pkg/gatewayserver/scheduling",
                      "name": "blocked",
                      "message_format": "sub band is blocked for `{duration}`",
                      "attributes": {
                        "duration": "46.498205s"
                      },
                      "correlation_id": "6c36aaaffff34c15a0f89b3ef5150858",
                      "code": 8
                    },
                    "code": 8
                  },
                  {
                    "namespace": "pkg/gatewayserver/io",
                    "name": "rx_window_schedule",
                    "message_format": "schedule in Rx window `{window}` failed",
                    "attributes": {
                      "window": 2
                    },
                    "correlation_id": "a6961648e0af4acaa45ff422404533de",
                    "cause": {
                      "namespace": "pkg/gatewayserver/scheduling",
                      "name": "blocked",
                      "message_format": "sub band is blocked for `{duration}`",
                      "attributes": {
                        "duration": "6.690829s"
                      },
                      "correlation_id": "9471c776018145afa19d5993029b83cf",
                      "code": 8
                    },
                    "code": 8
                  }
                ]
              }
            ]
          }
        ]
      }
    ]
  },
  "correlation_ids": [
    "gs:uplink:01J7K27CSKXC3H05YJZHSH1M3P",
    "ns:downlink:01J7K27EHZF9XRBVMY7ZFRZ8AT",
    "ns:transmission:01J7K27EHZMBSGF87F04HK4DE4"
  ],
  "origin": "ip-10-23-13-104.eu-west-1.compute.internal",
  "context": {
    "tenant-id": "CgNkdmQ="
  },
  "visibility": {
    "rights": [
      "RIGHT_APPLICATION_TRAFFIC_READ"
    ]
  },
  "unique_id": "01J7K27EJ0FJBSKYNHN14CXVG4"
}`Preformatted text`

I newbie in Lora so can you help me please.
Thanks.