W/System.err: com.sapher.youtubedl.YoutubeDLException: Error running exec().

[ZhangKuixun]

W/System.err: com.sapher.youtubedl.YoutubeDLException: Error running exec(). Command: [youtube-dl, https://www.youtube.com/watch?v=dQw4w9WgXcQ, --retries, 10, --output, %(id)s, --ignore-errors] Working Directory: Environment: [EXTERNAL_ADD_USB_STORAGE4=/storage/USBstorage4, EXTERNAL_ADD_USB_STORAGE2=/storage/USBstorage2, EMULATED_STORAGE_TARGET=/storage/emulated, EXTERNAL_ADD_USB_STORAGE6=/storage/USBstorage6, EXTERNAL_ADD_USB_STORAGE3=/storage/USBstorage3, EXTERNAL_STORAGE_DOCOMO=/storage/external_SD, ANDROID_SOCKET_zygote=10, PATH=/sbin:/vendor/bin:/system/sbin:/system/bin:/system/xbin, ANDROID_DATA=/data, EXTERNAL_ADD_USB_STORAGE5=/storage/USBstorage5, BOOTCLASSPATH=/system/framework/WfdCommon.jar:/system/framework/aspectjrt.jar:/system/framework/com.lge.frameworks.jar:/system/framework/com.lge.policy.jar:/system/framework/telephony-target.jar:/system/framework/com.lge.opt.jar:/system/framework/bc-fips.jar:/system/framework/tcmiface.jar:/system/framework/core-libart.jar:/system/framework/conscrypt.jar:/system/framework/okhttp.jar:/system/framework/core-junit.jar:/system/framework/bouncycastle.jar:/system/framework/ext.jar:/system/framework/framework.jar:/system/framework/telephony-common.jar:/system/framework/voip-common.jar:/system/framework/ims-common.jar:/system/framework/mms-common.jar:/system/framework/android.policy.jar:/system/framework/apache-xml.jar, SECONDARY_STORAGE=/storage/external_SD, ANDROID_STORAGE=/storage, EXTERNAL_ADD_USB_STORAGE1=/storage/USBstorage1, ANDROID_ROOT=/system, VIBE_PIPE_PATH=/dev/pipes, EMULATED_STORAGE_SOURCE=/mnt/shell/emulated, LOOP_MOUNTPOINT=/mnt/obb, LD_PRELOAD=libsigchain.so:libNimsWrap.so, ANDROID_BOOTLOGO=1, EXTERNAL_STORAGE=/storage/emulated/legacy, SYSTEMSERVERCLASSPATH=/system/framework/com.lge.services.jar:/system/framework/services.jar:/system/framework/ethernet-service.jar:/system/framework/wifi-service.jar, ANDROID_ASSETS=/system/app, ASEC_MOUNTPOINT=/mnt/asec, EXTERNAL_ADD_STORAGE=/storage/external_SD, ANDROID_PROPERTY_WORKSPACE=9,0]