Same here! The .log says:
2019-03-10 07:49:42 ERROR (MainThread) [homeassistant.components.automation] Error while executing automation automation.radio_an_wochenende. Unknown error for call_service at pos 1:
Traceback (most recent call last):
File "/srv/homeassistant/lib/python3.5/site-packages/homeassistant/components/automation/__init__.py", line 375, in action
await script_obj.async_run(variables, context)
File "/srv/homeassistant/lib/python3.5/site-packages/homeassistant/helpers/script.py", line 131, in async_run
await self._handle_action(action, variables, context)
File "/srv/homeassistant/lib/python3.5/site-packages/homeassistant/helpers/script.py", line 210, in _handle_action
action, variables, context)
File "/srv/homeassistant/lib/python3.5/site-packages/homeassistant/helpers/script.py", line 299, in _async_call_service
context=context
File "/srv/homeassistant/lib/python3.5/site-packages/homeassistant/helpers/service.py", line 85, in async_call_from_config
domain, service_name, service_data, blocking=blocking, context=context)
File "/srv/homeassistant/lib/python3.5/site-packages/homeassistant/core.py", line 1133, in async_call
self._execute_service(handler, service_call))
File "/usr/lib/python3.5/asyncio/futures.py", line 380, in __iter__
yield self # This tells Task to wait for completion.
File "/usr/lib/python3.5/asyncio/tasks.py", line 304, in _wakeup
future.result()
File "/usr/lib/python3.5/asyncio/futures.py", line 293, in result
raise self._exception
File "/usr/lib/python3.5/asyncio/tasks.py", line 239, in _step
result = coro.send(None)
File "/srv/homeassistant/lib/python3.5/site-packages/homeassistant/core.py", line 1155, in _execute_service
await handler.func(service_call)
File "/srv/homeassistant/lib/python3.5/site-packages/homeassistant/components/shell_command/__init__.py", line 89, in async_service_handler
cmd, process.returncode)
File "/usr/lib/python3.5/logging/__init__.py", line 1315, in exception
self.error(msg, *args, exc_info=exc_info, **kwargs)
File "/usr/lib/python3.5/logging/__init__.py", line 1309, in error
self._log(ERROR, msg, args, **kwargs)
File "/usr/lib/python3.5/logging/__init__.py", line 1416, in _log
self.handle(record)
File "/usr/lib/python3.5/logging/__init__.py", line 1426, in handle
self.callHandlers(record)
File "/usr/lib/python3.5/logging/__init__.py", line 1488, in callHandlers
hdlr.handle(record)
File "/usr/lib/python3.5/logging/__init__.py", line 856, in handle
self.emit(record)
File "/srv/homeassistant/lib/python3.5/site-packages/homeassistant/components/system_log/__init__.py", line 168, in emit
_figure_out_source(record, stack, self.hass))
File "/srv/homeassistant/lib/python3.5/site-packages/homeassistant/components/system_log/__init__.py", line 99, in __init__
self.root_cause = str(traceback.extract_tb(tb)[-1])
IndexError: list index out of range
Thanks