'https://github.com/blockchain_go_videos-master/part53-wallets/' was reset

in the file part10-address_Prototype/BLC/CLI.go,source code import a module named"github.com/blockchain_go_videos-master/part53-wallets/BLC" but i can't download such a file. The prompt error as follow:
fatal: unable to access 'https://github.com/blockchain_go_videos-master/part53-wallets/': Recv failure: Connection was reset