To get detailed Elastic beanstalk logging do the follow steps:

1.)  Go do elastic beanstalk service

2.) Click on the Service or endpoint you have configured

3.) Go to logs and click on request logs

4.) Select full logs and wait for it to complete as it may take some time.

5.) Download the zip and then you can view the set detailed elastic beanstalk logging.

Another way of getting logs is to login into the instance and get the logs real time if you know the credentials. Or integrate the logging  on elastic beanstalk  with cloud watch.