Reproduzi todo o código da aula (conferi várias vezes) não dá erro de compilação, porém a página não carrega, fica carregando eternamente e aparece um warning no console falando:
A cookie associated with a cross-site resource at https://ogs.google.com/ was set without the SameSite attribute. A future release of Chrome will only deliver cookies with cross-site requests if they are set with SameSite=None and Secure. You can review cookies in developer tools under Application>Storage>Cookies and see more details at https://www.chromestatus.com/feature/5088147346030592 and https://www.chromestatus.com/feature/5633521622188032.
