I am getting error while installing on Ubuntu

[akshaysas]

TASK [avinetworks.avisdk : Check ansible version] ******************************************************************************************************************************
skipping: [localhost]

TASK [Configure tunnel mode in service engine group] ***************************************************************************************************************************
fatal: [localhost]: FAILED! => {"changed": false, "module_stderr": "No handlers could be found for logger "avi.sdk.avi_api"\nTraceback (most recent call last):\n File "/tmp/ansible_qtsrTf/ansible_module_avi_serviceenginegroup.py", line 1751, in \n main()\n File "/tmp/ansible_qtsrTf/ansible_module_avi_serviceenginegroup.py", line 1747, in main\n set())\n File "/usr/local/lib/python2.7/dist-packages/avi/sdk/utils/ansible_utils.py", line 383, in avi_ansible_api\n port=api_creds.port,)\n File "/usr/local/lib/python2.7/dist-packages/avi/sdk/avi_api.py", line 452, in get_session\n max_api_retries=max_api_retries)\n File "/usr/local/lib/python2.7/dist-packages/avi/sdk/avi_api.py", line 299, in init\n self.authenticate_session()\n File "/usr/local/lib/python2.7/dist-packages/avi/sdk/avi_api.py", line 539, in authenticate_session\n self.authenticate_session()\n File "/usr/local/lib/python2.7/dist-packages/avi/sdk/avi_api.py", line 539, in authenticate_session\n self.authenticate_session()\n File "/usr/local/lib/python2.7/dist-packages/avi/sdk/avi_api.py", line 539, in authenticate_session\n self.authenticate_session()\n File "/usr/local/lib/python2.7/dist-packages/avi/sdk/avi_api.py", line 538, in authenticate_session\n raise err\nrequests.exceptions.ConnectionError: HTTPSConnectionPool(host='10.10.10.113', port=443): Max retries exceeded with url: /login (Caused by NewConnectionError('<urllib3.connection.HTTPSConnection object at 0x7fc5d4ed5290>: Failed to establish a new connection: [Errno 111] Connection refused',))\n", "module_stdout": "", "msg": "MODULE FAILURE", "rc": 1}
to retry, use: --limit @/root/demo-in-a-box-master/demos/nocloud/demo_nocloud.retry

PLAY RECAP *********************************************************************************************************************************************************************
localhost : ok=36 changed=3 unreachable=0 failed=1

=====> ERROR: install script encountered an error