2021-04-26 15:42:56-0700 [-] error while parsing config file:
        Traceback (most recent call last):
          File "/usr/local/lib/python3.7/site-packages/twisted/python/threadpool.py", line 266, in <lambda>
            inContext.theWork = lambda: context.call(ctx, func, *args, **kw)
          File "/usr/local/lib/python3.7/site-packages/twisted/python/context.py", line 122, in callWithContext
            return self.currentContext().callWithContext(ctx, func, *args, **kw)
          File "/usr/local/lib/python3.7/site-packages/twisted/python/context.py", line 85, in callWithContext
            return func(*args,**kw)
          File "/usr/local/lib/python3.7/site-packages/buildbot/config.py", line 170, in loadConfig
            self.basedir, self.configFileName)
        --- <exception caught here> ---
          File "/usr/local/lib/python3.7/site-packages/buildbot/config.py", line 128, in loadConfigDict
            execfile(filename, localDict)
          File "/usr/local/lib/python3.7/site-packages/twisted/python/compat.py", line 247, in execfile
            exec(code, globals, locals)
          File "/home/buildbot/avalonm1/master.cfg", line 36, in <module>
            util.Connection('qemu+ssh://builder@xxxx.xxxxx.xxxxx/system?socket=/var/run/libvirt/libvirt-sock'),
          File "/usr/local/lib/python3.7/site-packages/buildbot/worker/libvirt.py", line 130, in __init__
            self.connection = libvirt.open(uri)
        builtins.AttributeError: 'NoneType' object has no attribute 'open'