handle common errors
handle common errors

test1943/ShadowVPN,test1943/ShadowVPN,xiaguangme/ShadowVPN,tdh62/ShadowVPN,qskycolor/ShadowVPN,AI0day/ShadowVPN,sunclx/ShadowVPN,tdh62/ShadowVPN,nsdown/ShadowVPN,froggatt/ShadowVPN,froggatt/ShadowVPN,bjrara/ShadowVPN,nsdown/ShadowVPN,xiaguangme/ShadowVPN,noikiy/ShadowVPN,AI0day/ShadowVPN,qskycolor/ShadowVPN,sunclx/ShadowVPN,li77leprince/ShadowVPN,bjrara/ShadowVPN,nsdown/ShadowVPN,zhufenggood/ShadowVPN,noikiy/ShadowVPN,li77leprince/ShadowVPN,Spacecup/ShadowVPN,Spacecup/ShadowVPN,zhufenggood/ShadowVPN