compiling the sketch shows the error: within this context

C:\Users\OFFICE\Desktop\sketch_feb23c\sketch_feb23c\sketch_feb23c.ino:8:32: warning: invalid conversion from 'int' to 't_backlighPol' [-fpermissive]

 LiquidCrystal_I2C lcd(0x3F,16,2);  // set the LCD address to 0x27 for a 16 chars and 2 line display

                                ^

In file included from C:\Users\OFFICE\Desktop\sketch_feb23c\sketch_feb23c\sketch_feb23c.ino:6:0:

C:\Program Files (x86)\Arduino\libraries\LiquidCrystal/LiquidCrystal_I2C.h:53:4: note: initializing argument 3 of 'LiquidCrystal_I2C::LiquidCrystal_I2C(uint8_t, uint8_t, t_backlighPol)'

    LiquidCrystal_I2C (uint8_t lcd_Addr, uint8_t backlighPin, t_backlighPol pol);

    ^

C:\Program Files (x86)\Arduino\libraries\LiquidCrystal/LiquidCrystal_I2C.h: In function 'void setup()':

C:\Program Files (x86)\Arduino\libraries\LiquidCrystal/LiquidCrystal_I2C.h:154:9: error: 'int LiquidCrystal_I2C::init()' is private

    int  init();

         ^

sketch_feb23c:12: error: within this context

   lcd.init();                      // initialize the lcd

            ^

In file included from C:\Users\OFFICE\Desktop\sketch_feb23c\sketch_feb23c\sketch_feb23c.ino:6:0:

C:\Program Files (x86)\Arduino\libraries\LiquidCrystal/LiquidCrystal_I2C.h:154:9: error: 'int LiquidCrystal_I2C::init()' is private

    int  init();

         ^

sketch_feb23c:13: error: within this context

   lcd.init();

            ^

exit status 1
within this context