org.openqa.selenium.SessionNotCreatedException: Unable to create a new remote session. Please check the server log for more details. Original error: An unknown server-side error occurred while processing the command. Original error: Could not find a connected Android device in 20127ms.

I have an issue with docker android with selenium grid and appium that I can't find the attached devices
my yml file
```
`version: '3.7'

services:

selenium_hub:

image: selenium/hub:3.141.59-20200515

ports:

- 4444:4444

environment:

GRID_MAX_SESSION: 5

GRID_BROWSER_TIMEOUT: 300

GRID_TIMEOUT: 300

# Using Appium Docker Android
real_device:
image: appium/appium
depends_on:
- selenium_hub
network_mode: "service:selenium_hub"
privileged: true
volumes:
- /dev/bus/usb:/dev/bus/usb
- ~/.android:/root/.android
- $PWD/cyta.apk:/root/tmp
environment:
- CONNECT_TO_GRID=true
- SELENIUM_HOST=selenium_hub
# Enable it for msite testing
#- BROWSER_NAME=chrome

# Docker-Android for Android application testing
nexus_7.1.1:
image: budtmo/docker-android-x86-10.0
privileged: true
# Increase scale number if needed
scale: 1
depends_on:
- selenium_hub
- real_device
ports:
- 6080
# Change path of apk that you want to test. I use sample_apk that I provide in folder "example"
volumes:
- $PWD/cyta.apk:/root/tmp/cyta.apk
- ./video-nexus_7.1.1:/tmp/video
environment:
- DEVICE=Samsung Galaxy S9
- CONNECT_TO_GRID=true
- APPIUM=true
- SELENIUM_HOST=selenium_hub
- AUTO_RECORD=false`
```

my desired capabilities are
platformName=Android
deviceName=Samsung Galaxy S9
platformVersion=10.0
APP=pathto/cyta.apk

any help , what can I do to make my code works ?

error :
`
FAILED CONFIGURATION: @BeforeSuite launchingApp
org.openqa.selenium.SessionNotCreatedException: Unable to create a new remote session. Please check the server log for more details. Original error: An unknown server-side error occurred while processing the command. Original error: Could not find a connected Android device in 20127ms.
Build info: version: '3.141.59', revision: 'e82be7d358', time: '2018-11-14T08:17:03'
System info: host: 'Magdys-MacBook-Pro.local', ip: 'fdb4:f58e:67c9:3300:46:2f9f:8a05:8752%en0', os.name: 'Mac OS X', os.arch: 'x86_64', os.version: '10.15.7', java.version: '11.0.2'
Driver info: driver.version: AndroidDriver
remote stacktrace: UnknownError: An unknown server-side error occurred while processing the command. Original error: Could not find a connected Android device in 20127ms.
at getResponseForW3CError (/usr/lib/node_modules/appium/node_modules/appium-base-driver/lib/protocol/errors.js:804:9)
at asyncHandler (/usr/lib/node_modules/appium/node_modules/appium-base-driver/lib/protocol/protocol.js:380:37)
Build info: version: '3.141.59', revision: 'e82be7d358', time: '2018-11-14T08:17:03'
System info: host: 'Magdys-MacBook-Pro.local', ip: 'fdb4:f58e:67c9:3300:46:2f9f:8a05:8752%en0', os.name: 'Mac OS X', os.arch: 'x86_64', os.version: '10.15.7', java.version: '11.0.2'
Driver info: driver.version: AndroidDriver
at io.appium.java_client.remote.AppiumCommandExecutor$1.createSession(AppiumCommandExecutor.java:208)
at io.appium.java_client.remote.AppiumCommandExecutor.createSession(AppiumCommandExecutor.java:217)
at io.appium.java_client.remote.AppiumCommandExecutor.execute(AppiumCommandExecutor.java:239)
at org.openqa.selenium.remote.RemoteWebDriver.execute(RemoteWebDriver.java:552)
at io.appium.java_client.DefaultGenericMobileDriver.execute(DefaultGenericMobileDriver.java:41)
at io.appium.java_client.AppiumDriver.execute(AppiumDriver.java:1)
at io.appium.java_client.android.AndroidDriver.execute(AndroidDriver.java:1)
at org.openqa.selenium.remote.RemoteWebDriver.startSession(RemoteWebDriver.java:213)
at io.appium.java_client.AppiumDriver.startSession(AppiumDriver.java:336)
at org.openqa.selenium.remote.RemoteWebDriver.(RemoteWebDriver.java:131)
at io.appium.java_client.DefaultGenericMobileDriver.(DefaultGenericMobileDriver.java:37)
at io.appium.java_client.AppiumDriver.(AppiumDriver.java:88)
at io.appium.java_client.AppiumDriver.(AppiumDriver.java:98)
at io.appium.java_client.android.AndroidDriver.(AndroidDriver.java:94)
at com.cyta.Configurations.Capabilities.SetDriver(Capabilities.java:105)
at com.cyta.testBase.BaseTest.launchingApp(BaseTest.java:33)
at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.base/java.lang.reflect.Method.invoke(Method.java:566)
at org.testng.internal.MethodInvocationHelper.invokeMethod(MethodInvocationHelper.java:132)
at org.testng.internal.MethodInvocationHelper.invokeMethodConsideringTimeout(MethodInvocationHelper.java:61)
at org.testng.internal.ConfigInvoker.invokeConfigurationMethod(ConfigInvoker.java:366)
at org.testng.internal.ConfigInvoker.invokeConfigurations(ConfigInvoker.java:320)
at org.testng.SuiteRunner.privateRun(SuiteRunner.java:327)
at org.testng.SuiteRunner.run(SuiteRunner.java:286)
at org.testng.SuiteRunnerWorker.runSuite(SuiteRunnerWorker.java:53)
at org.testng.SuiteRunnerWorker.run(SuiteRunnerWorker.java:96)
at org.testng.TestNG.runSuitesSequentially(TestNG.java:1218)
at org.testng.TestNG.runSuitesLocally(TestNG.java:1140)
at org.testng.TestNG.runSuites(TestNG.java:1069)
at org.testng.TestNG.run(TestNG.java:1037)
at org.testng.remote.AbstractRemoteTestNG.run(AbstractRemoteTestNG.java:115)
at org.testng.remote.RemoteTestNG.initAndRun(RemoteTestNG.java:251)
at org.testng.remote.RemoteTestNG.main(RemoteTestNG.java:77)
Caused by: java.lang.reflect.InvocationTargetException
at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.base/java.lang.reflect.Method.invoke(Method.java:566)
at io.appium.java_client.remote.AppiumCommandExecutor$1.createSession(AppiumCommandExecutor.java:186)
... 34 more`