Other problems

Start from what you are seeing. Several of these are the product working as designed rather than a fault.

#In this section

Password-protected site's sign-in button does nothingA password-protected site's sign-in button does nothing.Everyone was signed out of my protected site at onceEveryone was signed out of my protected site at once.Saving Access settings fails with a generic errorSaving Access settings fails with a generic error.Custom CSS has no effect once a visitor toggles dark modeMy custom CSS has no effect once a visitor toggles dark mode.Theme's custom CSS or design tokens disappeared after saving AppearanceMy theme's custom CSS or design tokens disappeared after saving Appearance.

Troubleshooting

Every symptom.

Limits and quotas

When you hit a cap.

Update and promote

How publishing works.

Most of these are expected behaviour.