Error with Skywriter Hat

With completlety new hat i got this error:

pi@raspberrypi:~/Pimoroni/skywriter $ sudo python test.py
Traceback (most recent call last):
  File "test.py", line 2, in <module>
    import skywriter
  File "/usr/local/lib/python2.7/dist-packages/skywriter.py", line 488, in <module>
    i2c.write_i2c_block_data(SW_ADDR, 0xa1, [0b00000000, 0b00011111, 0b00000000, 0b00011111])
IOError: [Errno 5] Input/output error
Error in atexit._run_exitfuncs:
Traceback (most recent call last):
  File "/usr/lib/python2.7/atexit.py", line 24, in _run_exitfuncs
    func(*targs, **kargs)
  File "/usr/local/lib/python2.7/dist-packages/skywriter.py", line 479, in _exit
    stop_poll()
TypeError: 'NoneType' object is not callable
Error in sys.exitfunc:
Traceback (most recent call last):
  File "/usr/lib/python2.7/atexit.py", line 24, in _run_exitfuncs
    func(*targs, **kargs)
  File "/usr/local/lib/python2.7/dist-packages/skywriter.py", line 479, in _exit
    stop_poll()
TypeError: 'NoneType' object is not callable

Tested with few different sd cards with various raspbian image on two pi's (pi zero and version b). Every time the same error. Installer throws no exceptions, everything went smoothly. Moreover:

pi@raspberrypi:~/Pimoroni/skywriter $ sudo i2cdetect -y 1
0 1 2 3 4 5 6 7 8 9 a b c d e f
00: -- -- -- -- -- -- -- -- -- -- -- -- --
10: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
20: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
30: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
40: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
50: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
60: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
70: -- -- -- -- -- -- -- --