Open edX - Login/Register submit button disabled after the first fail attempt

The default login/registration form of Open edX has a bug that will disable the submit button after the first fail attempt and seem like no one want to fix it. Fortunately, you can use the combined login/registration form which does not have that bug. You enable it by enable the following feature flag:

"ENABLE_COMBINED_LOGIN_REGISTRATION": true

If you're using a custom comprehensive theme, you need to set it as a Site Configuration flag in the Django Admin.

But if you're not using a custom theme, you can just set it in your /edx/app/edxapp/lms.env.json file, under the FEATURES list.

Then restart your apps and enjoy:

$ /edx/bin/supervisorctl restart all