Cannot lock Java compile cache as it has already been locked by this process

My code does not have any runtime error but has the above compile time error I am using recyclerview Here is my code MainActivity.kt

class MainActivity : AppCompatActivity() {
    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)
        setContentView(R.layout.activity_main)

        recyclerView.layoutManager= LinearLayoutManager(this)
        val items=fetchData()
        val adapter=NewsListAdapter(items)
        recyclerView.adapter=adapter
    }
    fun fetchData():ArrayList<String>{
        val list=ArrayList<String>()
        for (i in 1 until 100){
            list.add("Items $i")
        }
        return list
    }
}

NewsListAdapter.kt

class NewsListAdapter(private val items: ArrayList<String>) : RecyclerView.Adapter<NewsViewHolder>() {
    override fun onCreateViewHolder(parent: ViewGroup, viewType: Int): NewsViewHolder {
        val view =LayoutInflater.from(parent.context).inflate(R.layout.items_news,parent,false)
        return NewsViewHolder(view)
    }

    override fun onBindViewHolder(holder: NewsViewHolder, position: Int) {
        val currentitem=items[position]
        holder.titletext.text = currentitem
    }

    override fun getItemCount(): Int {
        return  items.size
    }
}

class NewsViewHolder(itemView: View) : RecyclerView.ViewHolder(itemView) {
    val titletext: TextView =itemView.findViewById(R.id.textView)
}