Error when selecting from blank list

1. When list container is empty
2. Click "Select an Item"
3. an error is displayed in the console
"TypeError: Cannot read properties of undefined (reading 'length')" App.js 20

Open App.js around line 20 and reproduce the issue by selecting an item while the list container is empty. Inspect the failing path associated with the undefined length access. Done means selecting from a blank list no longer logs the reported TypeError in the console.

Written by the indexing model from the issue text.