question

Generally this means that your app doesn't have the required permissions for the API call you are making. If you can provide the call you are making and your app id that would be helpful.

Below is the entire code block, it almost exact from the getting start with android SDK guide clover provides

package com.example.cloverwallet;


import android.accounts.Account;
import android.os.AsyncTask;
import android.os.RemoteException;
import android.os.Bundle;
import android.util.Log;
import android.widget.TextView;

import androidx.appcompat.app.AppCompatActivity;

import com.clover.sdk.util.CloverAccount;
import com.clover.sdk.v1.BindingException;
import com.clover.sdk.v1.ClientException;
import com.clover.sdk.v1.ServiceException;
import com.clover.sdk.v3.inventory.InventoryConnector;
import com.clover.sdk.v3.inventory.Item;

/*
2) To get or set any Clover data, go through Clover’s Connector classes,
   such as InventoryConnector.
*/

public class MainActivity extends AppCompatActivity {

    private Account mAccount;
    private InventoryConnector mInventoryConnector;
    private TextView mTextView;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
    }

    @Override
    protected void onResume() {
        super.onResume();

        mTextView = (TextView) findViewById(R.id.activity_main_text_view);


        // Retrieve the Clover account
        if (mAccount == null) {
            mAccount = CloverAccount.getAccount(this);
            Log.d("SOPL","Account retrieved");
            Log.d("SOPL", String.valueOf(mAccount));



            if (mAccount == null) {
                return;
            }
        }

        // Connect InventoryConnector
        connect();

        // Get Item
        new InventoryAsyncTask().execute();
    }

 /*
3) Disconnect from the Clover Connectors when you aren’t using them to
   follow Android best practices and let the connection end naturally.
*/

    @Override
    protected void onDestroy() {
        super.onDestroy();
        disconnect();
        Log.d("SOPL","Destoyed");

    }

    private void connect() {
        disconnect();
        if (mAccount != null) {
            mInventoryConnector = new InventoryConnector(this, mAccount, null);

            mInventoryConnector.connect();
            Log.d("SOPL", String.valueOf(mInventoryConnector));

            Log.d("SOPL","Connected");
        }
    }

    private void disconnect() {
        if (mInventoryConnector != null) {
            mInventoryConnector.disconnect();
            mInventoryConnector = null;
            Log.d("SOPL","Disconnected");

        }
    }

/*
4) Use async tasks when working with Clover Connector classes to minimize
   work on the main UI thread while fetching or changing data. See
   https://docs.clover.com/clover-platform/docs/clover-development-
   basics-android#section-async-tasks-and-executors.
*/

    private class InventoryAsyncTask extends AsyncTask<Void, Void, Item> {

        @Override
        protected final Item doInBackground(Void... params) {
            try {
                //Get inventory item
                Log.d("SOPL","About to grab");
                return mInventoryConnector.getItem("MXFFBQHQPZY3C");

            } catch (RemoteException | ClientException | ServiceException | BindingException e) {
                e.printStackTrace();
                Log.d("SOPL","Failed");

            }
            return null;
        }

/*
5) Set the TextView to display the item’s name. For other methods that Item
   objects have, see
   https://clover.github.io/clover-android-sdk/com/clover/sdk/v3/inventory
   /Item.html
*/

        @Override
        protected final void onPostExecute(Item item) {
            if (item != null) {
                mTextView.setText(item.getName());
                Log.d("SOPL","Name set");

            }
        }
    }
}