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bug Studio Controls in Ubuntu Studio 20.10 can't open

 

Traceback (most recent call last):
 File "/usr/local/bin/studio-controls", line 1420, in <module>
   us = StudioControls()
 File "/usr/local/bin/studio-controls", line 426, in __init__
   jack.set_error_function(callback=self.jack_error)
 File "/usr/lib/python3/dist-packages/jack.py", line 2835, in
set_error_function
   _set_error_or_info_function(callback, _lib.jack_set_error_function)
 File "/usr/lib/python3/dist-packages/jack.py", line 2874, in
_set_error_or_info
_function
   def callback_wrapper(msg):
SystemError: ffi_prep_closure(): bad user_data (it seems that the version
of the
libffi library seen at runtime is different from the 'ffi.h' file seen at
compile
-time)