Unable clone the repository

trying to clone repository, getting below error.

Redirecting to URL ‘https://rhodecode.ivycomptech.co.in/testgroup/testingsvnone’:
svn: E175002: Unable to connect to a repository at URL ‘https://rhodecode.ivycomptech.co.in/testgroup/testing svnone’
svn: E175002: Server sent unexpected return value (500 Internal Server Error) in response to OPTIONS request for ‘https://rhodecode.ivycomptech.co.in/testgroup/testingsvnone

2018-11-15 08:56:19.095 [7244] INFO [rhodecode.lib.middleware.simplevcs] Access for IP:10.1.52.159 allowed
2018-11-15 08:56:19.156 [7244] INFO [rhodecode.lib.middleware.simplevcs] pull action on svn repo “testgroup/testingsvnone” by “default” from 10.1.52.159 SVN/1.7.14 neon/0.30.0
2018-11-15 08:56:19.167 [7244] INFO [rhodecode.lib.middleware.request_wrapper] IP: 10.1.52.159 Request to /testgroup/testingsvnone time: 0.228s [SVN/1.7.14 neon/0.30.0]
2018-11-15 08:56:19.168 [7244] ERROR [rhodecode.config.middleware] error occurred handling this request for path: /testgroup/testingsvnone
Traceback (most recent call last):
File “/opt/rhodecode/store/mxgf7jxv7p2nw91a4y9c89y8jia712g5-python2.7-pyramid-1.9.2/lib/python2.7/site-packages/pyramid/router.py”, line 276, in default_execution_policy

ConnectionError: HTTPConnectionPool(host=‘localhost’, port=8090): Max retries exceeded with url: /testgroup/testingsvnone (Caused by NewConnectionError(’<requests.packages.urllib3.connection.HTTPConnection object at 0x7f483a033750>: Failed to establish a new connection: [Errno 97] Address family not supported by protocol’,))
[15/Nov/2018:08:56:19 -0500] GNCRN <7244> 127.0.0.1 rqt:0.234991 500 3297 "OPTIONS:/testgroup/testingsvnone " usr:- “-” “SVN/1.7.14 neon/0.30.0”

Failed to establish a new connection: [Errno 97] Address family not supported by protocol’,))

would you please help me on this.