<how can I solve this error (Unresolved reference ...

# stackoverflow

[user]

how can I solve this error (Unresolved reference mariuszgromada) [duplicate]
// this is the main activity.kt
the error is (Unresolved reference mariuszgromada)
how can I solve it please help!!
How do I fix this Unresolved reference mariuszgromada error,
I write this code 2 times and the same error is exits
and thanks for your effert
anybody explain please!
anybody help please!
I don't know why the error is exits
package com.example.calculator

import androidx.appcompat.app.AppCompatActivity
import android.os.Bundle
import androidx.core.content.ContextCompat...