Sensor stopped working suddenly... anyone can help me?

Hi,

I have this sensor which tells the buss time and it was working fine… but suddenly today it stopped working and i cannot understand why?
Im using the latest version of the assistant.

here is the log:
Traceback (most recent call last):
File “/usr/lib/python3.6/site-packages/homeassistant/helpers/entity.py”, line 204, in async_update_ha_state
yield from self.async_device_update()
File “/usr/lib/python3.6/site-packages/homeassistant/helpers/entity.py”, line 327, in async_device_update
yield from self.hass.async_add_job(self.update)
File “/usr/lib/python3.6/asyncio/futures.py”, line 332, in iter
yield self # This tells Task to wait for completion.
File “/usr/lib/python3.6/asyncio/tasks.py”, line 250, in _wakeup
future.result()
File “/usr/lib/python3.6/asyncio/futures.py”, line 245, in result
raise self._exception
File “/usr/lib/python3.6/concurrent/futures/thread.py”, line 56, in run
result = self.fn(*self.args, **self.kwargs)
File “/config/custom_components/sensor/sl.py”, line 156, in update
for idx, value in enumerate(self._data.data[‘ResponseData’][traffictype]):
KeyError: ‘ResponseData’

Is it a custom sensor? Did you made it yourself or downloaded somewhere?