In case of this error, you should do the following:
Admin > [select policy] > Connections > NetSuite > select "Do not connect to NetSuite".
Select "Connect to NetSuite" > enter master admin credentials > Connect to NetSuite production (or Sandbox) depending on which environment you're using.
You will be taken to NetSuite where you will login with your master admin credentials. Then you will see a screen with the different NetSuite roles. Click Administrator before signing out to return to Expensify.