I am trying Devstack installation on a Virtual Machine to try  TROVE DbaaS. 

All the time    ./stack.sh      command   stops with the same error message at this particular point

+ functions:_upload_image:121              :   openstack --os-cloud=devstack-admin --os-region-name=RegionOne image create cirros-0.5.2-x86_64-disk --public --container-format bare --disk-format qcow2 --property hw_rng_model=virtio
Internal Server Error (HTTP 500)

I have ./unstack.sh  && ./clean.sh    and re run   ./stack.sh   multiple time but no progress.  Here always the script exit with error .   Screenshot attached

(using  "stack" user created by the devstack/tool/ stack user  script)

my local.conf file as follows  

here  10.184.48.187   is my VMs  IP 

Any hints to  rectify this error most welcome!!

############################################################

[[local|localrc]]
RECLONE=False
HOST_IP=10.184.48.187

enable_plugin trove https://opendev.org/openstack/trove
enable_plugin trove-dashboard https://opendev.org/openstack/trove-dashboard

LIBS_FROM_GIT+=,python-troveclient
DATABASE_PASSWORD=password
ADMIN_PASSWORD=password
SERVICE_PASSWORD=password
SERVICE_TOKEN=password
RABBIT_PASSWORD=password
LOGFILE=$DEST/logs/stack.sh.log
VERBOSE=True
LOG_COLOR=False
LOGDAYS=1

IPV4_ADDRS_SAFE_TO_USE=10.111.0.0/26
FIXED_RANGE=10.111.0.0/26
NETWORK_GATEWAY=10.111.0.1
FLOATING_RANGE=10.184.48.0/24
PUBLIC_NETWORK_GATEWAY=10.184.48.1

#pre requisites
ENABLED_SERVICES=rabbit,mysql,key

#nova
enable_service horizon

enable_service n-api

enable_service n-cpu

enable_service n-cond

enable_service n-sch
enable_service n-api-meta
enable_service placement-api
enable_service placement-client

#Glance


enable_service g-api
enable_service g-reg

#Cinder
enable_service cinder
enable_service c-api
enable_service c-vol

enable_service c-sch

#Neutron


enable_service q-svc
enable_service q-agt

enable_service q-dhcp
enable_service q-l3
enable_service q-meta

#enable DVR
Q_AGENT=openvswitch
Q_DVR_MODE=legacy
Q_ML2_PLUGIN_MECHANISM_DRIVERS=openvswitch
Q_ML2_TENANT_NETWORK_TYPE=vxlan
Q_PLUGIN=ml2

#SWIFT
ENABLED_SERVICES+=,swift
SWIFT_HASH=66a3d6b56c1f479c8b4e70ab5c2000f5
SWIFT_REPLICAS=1
stack@XenaCtrl1:/home/cloud/trove_devstack/devstack$

#################################################################