My system is FreeBSD 11.1, and this happens when using either the "py36-nyx-2.0.4" or the "py27-nyx-2.0.4" package (installed via pkg (latest).
Stack trace:
Traceback (most recent call last): File "/usr/local/bin/nyx", line 11, in <module> load_entry_point('nyx==2.0.4', 'console_scripts', 'nyx')() File "/usr/local/lib/python3.6/site-packages/nyx/__init__.py", line 176, in main nyx.starter.main() File "/usr/local/lib/python3.6/site-packages/stem/util/conf.py", line 289, in wrapped return func(*args, config = config, **kwargs) File "/usr/local/lib/python3.6/site-packages/nyx/starter.py", line 118, in main nyx.curses.start(nyx.draw_loop, acs_support = config.get('acs_support', True), transparent_background = True, cursor = False) File "/usr/local/lib/python3.6/site-packages/nyx/curses.py", line 217, in start curses.wrapper(_wrapper) File "/usr/local/lib/python3.6/curses/__init__.py", line 94, in wrapper return func(stdscr, *args, **kwds) File "/usr/local/lib/python3.6/site-packages/nyx/curses.py", line 215, in _wrapper function() File "/usr/local/lib/python3.6/site-packages/nyx/__init__.py", line 245, in draw_loop interface.redraw(force = not key.is_null()) File "/usr/local/lib/python3.6/site-packages/nyx/__init__.py", line 716, in redraw panel.redraw(force = force, top = occupied) File "/usr/local/lib/python3.6/site-packages/nyx/panel/__init__.py", line 175, in redraw self._last_draw_size = nyx.curses.draw(self._draw, top = self._top, height = self.get_height(), draw_if_resized = draw_dimension) File "/usr/local/lib/python3.6/site-packages/nyx/curses.py", line 740, in draw curses_subwindow = CURSES_SCREEN.subwin(subwindow_height, subwindow_width, top, left)_curses.error: curses function returned NULL