error using for playDTMF

[starlessboi]

Hi, I'm using this library for a while, thanks for your effort.
recently I tried using that for playing dtmf with action playDTMF
it plays beep sound but gives error as output, and code hangs, with this error:

Exception in callback _SelectorSocketTransport._read_ready()
handle: <Handle _SelectorSocketTransport._read_ready()>
Traceback (most recent call last):
File "/usr/lib64/python3.6/asyncio/events.py", line 145, in _run
self._callback(*self._args)
File "/usr/lib64/python3.6/asyncio/selector_events.py", line 721, in _read_ready
self._protocol.data_received(data)
File "/opt/qs_main/qs_mainenv/lib64/python3.6/site-packages/panoramisk/ami_protocol.py", line 72, in data_received
self.handle_message(message)
File "/opt/qs_main/qs_mainenv/lib64/python3.6/site-packages/panoramisk/ami_protocol.py", line 79, in handle_message
if response.add_message(message):
File "/opt/qs_main/qs_mainenv/lib64/python3.6/site-packages/panoramisk/actions.py", line 92, in add_message
multi = self.multi
File "/opt/qs_main/qs_mainenv/lib64/python3.6/site-packages/panoramisk/actions.py", line 71, in multi
elif msg.endswith('successfully queued') and self['async'] != 'false':
File "/opt/qs_main/qs_mainenv/lib64/python3.6/site-packages/panoramisk/utils.py", line 179, in getitem
return self._store[key.lower()][1]
KeyError: 'async'

would you please guide me through solving this issue?
thanks

[gawel]

Looks like duplicate #88