Error bench update

Im getting this error when i try update the bench

While the bench is updating, this error appears a lot of times:

INFO:bench.utils:find . -name "*.pyc" -delete
INFO:bench.app:pulling jasper_erpnext_report
INFO:bench.utils:git pull  upstream master
WARNING: gnome-keyring:: couldn't connect to: /run/user/1000/keyring-lMt35p/pkcs11: Connection refused
p11-kit: skipping module 'gnome-keyring' whose initialization failed: An error occurred on the device
From https://github.com/saguas/jasper_erpnext_report
 * branch            master     -> FETCH_HEAD
Already up-to-date.

And then:

Traceback (most recent call last):
  File "/usr/lib/python2.7/runpy.py", line 162, in _run_module_as_main
    "__main__", fname, loader, pkg_name)
  File "/usr/lib/python2.7/runpy.py", line 72, in _run_code
    exec code in run_globals
  File "/home/frappe/frappe-bench/apps/frappe/frappe/utils/bench_helper.py", line 94, in <module>
    main()
  File "/home/frappe/frappe-bench/apps/frappe/frappe/utils/bench_helper.py", line 18, in main
    click.Group(commands=commands)(prog_name='bench')
  File "/home/frappe/frappe-bench/env/local/lib/python2.7/site-packages/click/core.py", line 722, in __call__
    return self.main(*args, **kwargs)
  File "/home/frappe/frappe-bench/env/local/lib/python2.7/site-packages/click/core.py", line 697, in main
    rv = self.invoke(ctx)
  File "/home/frappe/frappe-bench/env/local/lib/python2.7/site-packages/click/core.py", line 1066, in invoke
    return _process_result(sub_ctx.command.invoke(sub_ctx))
  File "/home/frappe/frappe-bench/env/local/lib/python2.7/site-packages/click/core.py", line 1066, in invoke
    return _process_result(sub_ctx.command.invoke(sub_ctx))
  File "/home/frappe/frappe-bench/env/local/lib/python2.7/site-packages/click/core.py", line 895, in invoke
    return ctx.invoke(self.callback, **ctx.params)
  File "/home/frappe/frappe-bench/env/local/lib/python2.7/site-packages/click/core.py", line 535, in invoke
    return callback(*args, **kwargs)
  File "/home/frappe/frappe-bench/env/local/lib/python2.7/site-packages/click/decorators.py", line 17, in new_func
    return f(get_current_context(), *args, **kwargs)
  File "/home/frappe/frappe-bench/apps/frappe/frappe/commands/__init__.py", line 24, in _func
    ret = f(frappe._dict(ctx.obj), *args, **kwargs)
  File "/home/frappe/frappe-bench/apps/frappe/frappe/commands/site.py", line 285, in backup
    frappe.init(site=site)
  File "/home/frappe/frappe-bench/apps/frappe/frappe/__init__.py", line 135, in init
    local.conf = _dict(get_site_config())
  File "/home/frappe/frappe-bench/apps/frappe/frappe/__init__.py", line 189, in get_site_config
    config.update(get_file_json(site_config))
  File "/home/frappe/frappe-bench/apps/frappe/frappe/__init__.py", line 879, in get_file_json
    return json.load(f)
  File "/usr/lib/python2.7/json/__init__.py", line 290, in load
    **kw)
  File "/usr/lib/python2.7/json/__init__.py", line 338, in loads
    return _default_decoder.decode(s)
  File "/usr/lib/python2.7/json/decoder.py", line 366, in decode
    obj, end = self.raw_decode(s, idx=_w(s, 0).end())
  File "/usr/lib/python2.7/json/decoder.py", line 382, in raw_decode
    obj, end = self.scan_once(s, idx)
ValueError: Expecting property name: line 7 column 1 (char 134)

seems like you have invalid json, please check the json in the sites/your_site/site_config.json

Fixed! Thank you