Build Failure when Running Command ./mvnw clean package

[abentsui]

Hi, I am new to Spring and Azure.
I follow the step 6 in 'Build and run the web app locally' and run the command: ./mvnw clean package
There is failure. The error message is:

[ERROR] Tests run: 1, Failures: 1, Errors: 0, Skipped: 0, Time elapsed: 2.71 s <<< FAILURE! - in hello.GreetingControllerTest
[ERROR] greetingShouldReturnDefaultMessage Time elapsed: 0.583 s <<< FAILURE!
java.lang.AssertionError: Status expected:<200> but was:<404>
at hello.GreetingControllerTest.greetingShouldReturnDefaultMessage(GreetingControllerTest.java:43)