How to change Login to ERPNext

We would like to ask you to please help me in this matter.
After update from v12 to v13. I am getting this message on login page and ERPNext mobile application is not working also.

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Use this custom app.

For mobile app use new frappe mobile app.

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https://github.com/frappe/frappe/pull/14020

You can also set app name and logo under Website Settings in V13.