Attiny85/Digispark Multiple Buttons

Projects General Guidance
3

I put 1k resistors between buttons and the pins. I fixed the LOW/HIGH confusion. After these changes the screen showed the "Press a button" text but nothing happened when I pressed the buttons neither on the screen nor the led. So I deleted the text on "else" case. Now the screen displays "2 is pressed" although I am not pressing. The led is on. But text changes to "1 is pressed" when I click the 1 button. The code is below

#include <TinyWireM.h>        
#include <LiquidCrystal_I2C.h> 

#define GPIO_ADDR     0x3f

LiquidCrystal_I2C lcd(GPIO_ADDR,16,2); 

const int button1 = 3;
const int button2 = 4;
const int ledPin =  1;
int button1State = 0;
int button2State = 0;

void setup(){
  pinMode(ledPin, OUTPUT);
  pinMode(button1, INPUT_PULLUP);
  pinMode(button2, INPUT_PULLUP);
  
  TinyWireM.begin();
  lcd.init();
  lcd.backlight();
  
}

void loop(){
  delay(50);

  button1State = digitalRead(button1);
  button2State = digitalRead(button2);
  
  if(button1State==LOW){
     digitalWrite(ledPin, HIGH);
     lcd.clear();
     lcd.print("1 is pressed");
  }
  else if(button2State==LOW){
     digitalWrite(ledPin, HIGH);
     lcd.clear();
     lcd.print("2 is pressed");
     }
  else
    digitalWrite(ledPin, LOW);
}

I was thinking that something is wrong about the screen and while digging the forum I found this post which is written by you exactly 2 years ago:) Troubles getting lcd display & i2c working with Digispark Attiny85

I already tried the library but got an error:

In file included from C:\Users....ino:2:0:
C:...\Arduino\libraries\hd44780/hd44780.h:152:77: error: '__FlashStringHelper' does not name a type
size_t attribute ((error("println() is not supported"))) println(const __FlashStringHelper *);
^
C:...\Arduino\libraries\hd44780/hd44780.h:152:97: error: ISO C++ forbids declaration of 'parameter' with no type [-fpermissive]
size_t attribute ((error("println() is not supported"))) println(const __FlashStringHelper *);
^
exit status 1
Error compiling for board Digispark (Default - 16.5mhz).