As we see that your port 8080 is showing. EDB Postgress process which indicates that you might be Running a background Postgress process on your Laptop which is causing conflict with the Sandbox Ambari port 8080.
So please stop the EDB postgress process on your laptop and then try accessing the port 8080 again.
Or change the default port of EDB postgres to something else. Please refer to the following link to know more about EDB postgres: https://www.enterprisedb.com/docs/en/9.0/instpemcloud/CD_Tutorial_Installing_PEM_on_a_Cloud_Database...
The above link says:
● Specify the Port on which the Apache/PHP server is listening; by default, the Apache/PHP server listens on port 8080.