Having trouble with listing 6:15 updating

iOS Programming (7th Edition) 6. Text Input and Delegation
1

Screen Shot 2021-11-26 at 6.16.51 PM
Screen Shot 2021-11-26 at 6.16.51 PM1444×514 65.5 KB

can figure out why this is not working any help would be appreciated

2

On the line with the error, it’s “text?”, not “test?”.