我有三台设备，能运行代码。用appium截屏获取屏幕元素，一点击start session就报这错误:An unknown server-side error occurred while processing the command. Original error: Cannot start the ‘com.ss.android.ugc.aweme.lite’ application. Visit https://github.com/appium/appium/blob/master/docs/en/writing-running-appium/android/activity-startup.md for troubleshooting. Original error: Cannot start the ‘com.ss.android.ugc.aweme.lite’ application. Visit https://github.com/appium/appium/blob/master/docs/en/writing-running-appium/android/activity-startup.md for troubleshooting. Original error: Activity name ‘.com.ss.android.ugc.aweme.splash.SplashActivity’ used to start the app doesn’t exist or cannot be launched! Make sure it exists and is a launchable activity，请教老师