FileNotFoundError: [WinError 2] The system cannot find the file specified

$ ./openshs start --context morning -p
Starting the morning context.
What's the starting time? [2016-02-01 08:00:00]:
Traceback (most recent call last):
File "./openshs", line 165, in
main()
File "C:\Users\lilak\AppData\Local\Programs\Python\Python37\lib\site-packages\click\core.py", line 764, in __call__
return self.main(*args, **kwargs)
File "C:\Users\lilak\AppData\Local\Programs\Python\Python37\lib\site-packages\click\core.py", line 717, in main
rv = self.invoke(ctx)
File "C:\Users\lilak\AppData\Local\Programs\Python\Python37\lib\site-packages\click\core.py", line 1137, in invoke
return _process_result(sub_ctx.command.invoke(sub_ctx))
File "C:\Users\lilak\AppData\Local\Programs\Python\Python37\lib\site-packages\click\core.py", line 956, in invoke
return ctx.invoke(self.callback, **ctx.params)
File "C:\Users\lilak\AppData\Local\Programs\Python\Python37\lib\site-packages\click\core.py", line 555, in invoke
return callback(*args, **kwargs)
File "./openshs", line 115, in start
subprocess.call(["primusrun", "blender", CONTEXTS[context]['exe']], stdout=subprocess.DEVNULL, stderr=subprocess.DEVNULL)
File "C:\Users\lilak\AppData\Local\Programs\Python\Python37\lib\subprocess.py", line 323, in call
with Popen(*popenargs, **kwargs) as p:
File "C:\Users\lilak\AppData\Local\Programs\Python\Python37\lib\subprocess.py", line 775, in __init__
restore_signals, start_new_session)
File "C:\Users\lilak\AppData\Local\Programs\Python\Python37\lib\subprocess.py", line 1178, in _execute_child
startupinfo)
FileNotFoundError: [WinError 2] The system cannot find the file specified

Please help!