Wix users must login via the Wix backend.
Wix users do not have an email and password based login, the only method of access is via the Wix dashboard.
Open the Wix dashboard
Navigate to 'Manage apps'
Click 'Open' on the Promolayer app.
How to log in (Wix users)
Step-by-step guide for Wix users to log in to Promolayer and access their dashboard after installing the Promolayer app.