I recently upgraded from Material V4 to V5 and I'm now getting the following error:

MUI: The `styles` argument provided is invalid.
You are providing a function without a theme in the context.
One of the parent elements needs to use a ThemeProvider.

Within my App.js file, I have the following setup:

import { createTheme, ThemeProvider, StyledEngineProvider, adaptV4Theme } from '@mui/material/styles';
import makeStyles from '@mui/styles/makeStyles';
import { CssBaseline, Hidden } from '@mui/material';


let theme = createTheme(adaptV4Theme({
  palette: {
    primary: {
      light: '#63ccff',
      main: '#009be5',
      dark: '#006db3'
    }
  },
  typography: {
    h5: {
      fontWeight: 500,
      fontSize: 26,
      letterSpacing: 0.5
    }
  },
  shape: {
    borderRadius: 8
  },
  props: {
    MuiTab: {
      disableRipple: true
    }
  },
  mixins: {
    toolbar: {
      minHeight: 48
    }
  }
}));

theme = {
  ...theme,
  overrides: {
    MuiDrawer: {
      paper: {
        backgroundColor: '#18202c'
      }
    }
  }
};

and then have the following return within my App.js:

  const classes = useStyles();

  return (
    <NotifyProvider>
        <Routes>
          <Route path="/login" element={<Login />}></Route>
          <Route path="/logout" element={<Logout />}></Route>
        </Routes>
          <StyledEngineProvider injectFirst>
            <ThemeProvider theme={theme}>
              <div className={classes.root}>
                <CssBaseline />
                <nav className={classes.drawer}>
                </nav>
                <div className={classes.app}>
                  <Header
                    onDrawerToggle={handleDrawerToggle}
                  />
                  <main className={classes.main}>
                    <Routes>
                      <Route path="/" />
                    </Routes>
                  </main>
                </div>
              </div>
            </ThemeProvider>
          </StyledEngineProvider>
    </NotifyProvider>
  );

I'm not sure what the issue is and what I am missing but I also noticed that adaptV4Theme is depracated.

Any help would be great as the app is not starting at all.