Github không thể được thiết lập

Xin chào Tôi đang cố gắng xây dựng Ứng dụng web Camunda bằng Grunt. Nhưng nó báo cáo rằng kết nối máy chủ Github không thể thiết lập. Làm thế nào để khắc phục nó?

Windows 7, Git & amp; Maven & amp; Tất cả NodeJS được thiết lập trong "đường dẫn" biến môi trường.

C:\Workspace\CamundaSourceCode\camunda-bpm-webapp>grunt setup
Will start the platform with command
mvn clean install jetty:run -DskipTests -Pdevelop,livereload
Tests are skipped

Running "parallel:clone" (parallel) task
Cloning into 'camunda-bpm-sdk-js'...
Cloning into 'camunda-commons-ui'...
Cloning into 'camunda-admin-ui'...
Cloning into 'camunda-cockpit-ui'...
Cloning into 'camunda-tasklist-ui'...
Cloning into 'camunda-cockpit-plugin-base'...
The authenticity of host 'github.com (192.30.252.130)' can't be established.
RSA key fingerprint is 16:27:ac:a5:76:28:2d:36:63:1b:56:4d:eb:df:a6:48.
Are you sure you want to continue connecting (yes/no)? The authenticity of host 'github.com (192.30.252.130)' can't be established.
RSA key fingerprint is 16:27:ac:a5:76:28:2d:36:63:1b:56:4d:eb:df:a6:48.The authenticity of host 'github.com (192.30.252.130)' can't be established.
RSA key fingerprint is 16:27:ac:a5:76:28:2d:36:63:1b:56:4d:eb:df:a6:48.

Are you sure you want to continue connecting (yes/no)? Are you sure you want to continue connecting (yes/no)? The authenticity of host 'github.com (192.30.252.130)' can't be established.
RSA key fingerprint is 16:27:ac:a5:76:28:2d:36:63:1b:56:4d:eb:df:a6:48.
Are you sure you want to continue connecting (yes/no)? The authenticity of host 'github.com (192.30.252.130)' can't be established.
RSA key fingerprint is 16:27:ac:a5:76:28:2d:36:63:1b:56:4d:eb:df:a6:48.
Are you sure you want to continue connecting (yes/no)? The authenticity of host 'github.com (192.30.252.130)' can't be established.
RSA key fingerprint is 16:27:ac:a5:76:28:2d:36:63:1b:56:4d:eb:df:a6:48.
Are you sure you want to continue connecting (yes/no)? yes
Please type 'yes' or 'no': yes
Please type 'yes' or 'no': yes
Please type 'yes' or 'no':
Host key verification failed.
fatal: Could not read from remote repository.

Please make sure you have the correct access rights
and the repository exists.

    >>
Warning: Task "parallel:clone" failed. Use --force to continue.

Aborted due to warnings.

C:\Workspace\CamundaSourceCode\camunda-bpm-webapp>