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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