# Everyone was signed out of my protected site at once **What you are seeing** Everyone was signed out of my protected site at once. --- ## Why it happens A platform update to the sign-in mechanism invalidates all existing sessions. --- ## What to do Visitors just sign in again. Nothing is lost. --- ## Related [Saving Access settings fails with a generic errorThere is a hidden cap of 12 access-configuration changes per hour per tenant, with no mess](https://help.gocapable.com/sites/saving-access-settings-fails-with-a-generic-error.html) [Custom CSS has no effect once a visitor toggles dark modeThe built-in palette is defined at a higher specificity than a plain :root rule, so a bare](https://help.gocapable.com/sites/custom-css-has-no-effect-once-a-visitor-toggles-dark-mode.html) [Other problemsThe rest of this family.](https://help.gocapable.com/sites/other-problems.html) --- _Found it? Good._