Exception in thread Thread-1:
Traceback (most recent call last):
File "threading.py", line 914, in _bootstrap_inner
File "threading.py", line 862, in run
File "kivy/input/providers/mtdev.py", line 219, in _thread_run
File "kivy/lib/mtdev.py", line 131, in init
PermissionError: [Errno 13] Permission denied: '/dev/input/event6'

Exception in thread MSKeyAction:
Traceback (most recent call last):
File "threading.py", line 914, in _bootstrap_inner
File "threading.py", line 862, in run
File "transitions/core.py", line 238, in trigger
File "transitions/core.py", line 568, in _process
File "transitions/extensions/nesting.py", line 118, in _trigger
File "transitions/core.py", line 167, in execute
File "transitions/core.py", line 547, in _callback
File "music_sampler/key.py", line 170, in run_actions
File "transitions/core.py", line 238, in trigger
File "transitions/core.py", line 568, in _process
File "transitions/extensions/nesting.py", line 118, in _trigger
File "transitions/core.py", line 164, in execute
File "transitions/extensions/nesting.py", line 98, in _change_state
File "transitions/extensions/nesting.py", line 85, in enter_nested
File "transitions/core.py", line 51, in enter
File "transitions/core.py", line 547, in _callback
File "music_sampler/action.py", line 107, in on_enter_loaded_running
File "music_sampler/actions/stop.py", line 17, in run
File "music_sampler/music_file.py", line 243, in stop
File "transitions/core.py", line 238, in trigger
File "transitions/core.py", line 555, in _process
File "transitions/extensions/nesting.py", line 113, in _trigger
transitions.core.MachineError: "Can't trigger event stop_playing from state loaded_stopped!"

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