404 using cherrypy.tree.mount

I am using CherryPy-5.3.0, mod_wsgi-4.4.21, and apache-2.4

When I use cherrypy.Application(), I get the expected response.

I want to migrate to using cherrypy.tree.mount(), but I always see 404.

myproject.wsgi (attached) has a function get_app(), where I try to use
either cherrypy.Application() or cherrypy.tree.mount() by commenting and
uncommenting.

In case it matters, my apache config:
        WSGIScriptAlias  /cherrypy
/var/www/localhost/wsgi/project_cherrypy/myproject.wsgi
        <Directory "/var/www/localhost/wsgi/project_cherrypy">
            AllowOverride None
        Options None
        Require all granted
        </Directory>

Logs when I use cherrypy.tree.mount():

==> /var/log/apache2/error_log <==
[Mon May 02 21:15:06.429073 2016] [wsgi:info] [pid 18153] [client
::1:51425] mod_wsgi (pid=18153, process='',
application='localhost|/cherrypy'): Reloading WSGI script
'/var/www/localhost/wsgi/project_cherrypy/myproject.wsgi'.

==> /var/log/apache2/access_log <==
::1 - - [02/May/2016:21:15:06 -0700] "GET /cherrypy/joe/ HTTP/1.1" 404 745

==> logs/access.log <==
::1 - - [02/May/2016:21:15:06] "GET /cherrypy/joe/ HTTP/1.1" 404 745 ""
"Mozilla/5.0 (X11; Linux x86_64; rv:38.0) Gecko/20100101 Firefox/38.0"

Logs when I use cherrypy.Application() :

==> /var/log/apache2/error_log <==
[Mon May 02 22:00:50.174465 2016] [wsgi:info] [pid 18154] [client
::1:51788] mod_wsgi (pid=18154, process='',
application='localhost|/cherrypy'): Reloading WSGI script
'/var/www/localhost/wsgi/project_cherrypy/myproject.wsgi'.

==> /var/log/apache2/access_log <==
::1 - - [02/May/2016:22:00:50 -0700] "GET /cherrypy/joe/ HTTP/1.1" 200 9

==> logs/access.log <==
::1 - - [02/May/2016:22:00:50] "GET /cherrypy/joe/ HTTP/1.1" 200 9 ""
"Mozilla/5.0 (X11; Linux x86_64; rv:38.0) Gecko/20100101 Firefox/38.0"

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import os
import sys

# Apache base for the app
here = os.path.dirname(__file__)

# Activate virtualenv
activate_this = os.path.join( here, 'venv', 'bin','activate_this.py')
execfile(activate_this, dict(__file__=activate_this))

# Add to python path 
sys.path.insert(0,here)

# Not sure about this one
sys.stdout = sys.stderr

# Base module
import cherrypy

cherrypy.config.update({'environment': 'embedded'})

@cherrypy.popargs('name')
class Root(object):
    @cherrypy.expose
    def index(self, name):
        return 'Hello {}'.format(name)

conf = {
    '/': {
        'log.access_file' : os.path.abspath(os.path.join( os.path.dirname(__file__),'logs','access.log')),
        'log.error_file' : os.path.abspath(os.path.join( os.path.dirname(__file__),'logs','error.log')),
        'tools.staticdir.root' : os.path.abspath(os.path.dirname(__file__)),
        'tools.response_headers.on': True,
        'tools.response_headers.headers': [('Content-Type', 'text/plain')],
    }
}
def get_app(config=None):
    # This works
    #return cherrypy.Application(Root(), script_name=None, config=conf)
    # This responds wiht 404 
    cherrypy.config.update(config)
    cherrypy.tree.mount(Root(),script_name='' ,config=config)
    return cherrypy.tree

application = get_app(config=conf)

if __name__ == '__main__':
     # when run as script, outside apache
     cherrypy.quickstart(Root(), '/', conf)