No valid CSRF token found in request for the POJO Web Services using Apache Axis2

I am learning axis2 by doing the "POJO Web Services using Apache Axis2". WeatherService.aar was built successfully. I set the path to the WeatherService.aar in the Administration Console. Then I click the upload icon. The "No valid CSRF token found in request" message appear in the web browser.

No valid CSRF token found in request for the POJO Web Services using Apache Axis2

I am learning axis2 by doing the "POJO Web Services using Apache Axis2". WeatherService.aar was built successfully. I set the path to the WeatherService.aar in the Administration Console. Then I click the upload icon. The "No valid CSRF token found in request" message appear in the web browser.