error in airnotifier log

[sweta484]

[I 180604 17:26:09 apns:190] APNs connection: swet[0] is online
Enter PEM pass phrase:
[E 180604 17:26:09 iostream:543] Uncaught exception, closing connection.
Traceback (most recent call last):
File "/usr/lib64/python2.7/site-packages/tornado/iostream.py", line 504, in _handle_events
self._handle_connect()
File "/usr/lib64/python2.7/site-packages/tornado/iostream.py", line 1359, in _handle_connect
do_handshake_on_connect=False)
File "/usr/lib64/python2.7/site-packages/tornado/netutil.py", line 501, in ssl_wrap_socket
context = ssl_options_to_context(ssl_options)
File "/usr/lib64/python2.7/site-packages/tornado/netutil.py", line 478, in ssl_options_to_context
context.load_cert_chain(ssl_options['certfile'], ssl_options.get('keyfile', None))
IOError: [Errno 22] Invalid argument
[E 180604 17:26:09 ioloop:612] Exception in callback None
Traceback (most recent call last):
File "/usr/lib64/python2.7/site-packages/tornado/ioloop.py", line 866, in start
handler_func(fd_obj, events)
File "/usr/lib64/python2.7/site-packages/tornado/stack_context.py", line 275, in null_wrapper
return fn(*args, **kwargs)
File "/usr/lib64/python2.7/site-packages/tornado/iostream.py", line 504, in _handle_events
self._handle_connect()
File "/usr/lib64/python2.7/site-packages/tornado/iostream.py", line 1359, in _handle_connect
do_handshake_on_connect=False)
File "/usr/lib64/python2.7/site-packages/tornado/netutil.py", line 501, in ssl_wrap_socket
context = ssl_options_to_context(ssl_options)
File "/usr/lib64/python2.7/site-packages/tornado/netutil.py", line 478, in ssl_options_to_context
context.load_cert_chain(ssl_options['certfile'], ssl_options.get('keyfile', None))
IOError: [Errno 22] Invalid argument
[

[dcai]

closing as I couldn't reproduce it anymore.