"400 Invalid Email" error when logging in

When a user reports the exact error "400 Invalid Email" while logging in to the Munily app, there is NOT just one cause. Check the following in order: 1) Spaces or email format: It's very common for the email address to have a space at the beginning or end, or to contain uppercase letters. Ask them to re-enter it without spaces and in lowercase. 2) Outdated app: This error has been fixed; ask them to update the Munily app to the latest version (2.53.4 or higher) from the App Store or Play Store. 3) If the email address is correct and the app is up to date but the issue persists, please contact support. (Fixed in release 2.53.4, June 25, 2026.)