This is a security feature, not an error. The system detected the email and password combination you entered in a public data breach from another website. To protect your Split Pay account, you'll need to choose a different password.
This doesn't mean your Split Pay account was compromised — it means this password was exposed somewhere else and shouldn't be reused.
Your new password needs:
At least 8 characters
One uppercase letter
One lowercase letter
One number or special character
A few tips for picking a stronger password:
Use a passphrase — combine a few random words you'll remember but others won't guess
Or use a password manager to generate and store a unique password just for Split Pay
This check is non-negotiable, even if you've used the password elsewhere without issues. Once you choose a different password, you can finish creating your account.