The SoB (DCO) check failed 9172c189492d0ef7a4fa0babb016cf81f3174369 Expected "sjtucoder <sjtucoder@icloud.com>", but got "sjtucoder <sjtucoder@icloud.com.>". What should I do to fix it ? All proposed commits should include a Signed-off-by: <your-name> <your-email-address> line in their commit message. This is most conveniently done by using --signoff (-s) when running git commit.