Problem on LiquidiCrystalClass_I2C

[tsuriu]

I'm trying to upload nanpy-firmware to a Arduino UNO R3 following the instructions on nanpy.github.io, but...

`
Arduino: 1.8.3 (Linux), Board:"Arduino/Genuino Uno"

sketch/LiquidCrystalClass_I2C.cpp: In member function 'virtual void nanpy::LiquidCrystalClass_I2C::elaborate(nanpy::MethodDescriptor*)':
LiquidCrystalClass_I2C.cpp:32: error: 't_backlighPol' was not declared in this scope
(t_backlighPol)m->getInt(prm++))),
^
LiquidCrystalClass_I2C.cpp:33: error: no matching function for call to 'LiquidCrystal_I2C::begin(int, int)'
v[m->getObjectId()]->begin(m->getInt(prm++), m->getInt(prm++));
^
sketch/LiquidCrystalClass_I2C.cpp:33:74: note: candidate is:
In file included from sketch/LiquidCrystalClass_I2C.cpp:6:0:
~/Arduino/libraries/Arduino-LiquidCrystal-I2C-library-master/LiquidCrystal_I2C.h:76:7: note: void LiquidCrystal_I2C::begin()
void begin();
^
~/Arduino/libraries/Arduino-LiquidCrystal-I2C-library-master/LiquidCrystal_I2C.h:76:7: note: candidate expects 0 arguments, 2 provided
exit status 1
't_backlighPol' was not declared in this scope
`