Demo error

[r-barnes]

This is super cool!

But on the demo I'm seeing the error

react-dom.production.min.js:216 TypeError: Cannot read properties of null (reading 'A1')

[r-barnes]

Oddly, this occurs on Chrome on both my Linux and Mac machines, but not Chrome on my Android.

[r-barnes]

Firefox on my Linux machine is also failing in the same way with no extensions present.

[r-barnes]

Running in dev mode from the CLI shows that the error happens at:

   4 | import { ThemeProvider } from "./../util/theme.js";
   5 | 
   6 | function App(props) {
>  7 |   const [title, setTitle] = useState(JSON.parse(localStorage.getItem("montesheet"))['A1'] || "Montesheet");
   8 | 
   9 |   return (
  10 |     <ThemeProvider>