404 error found

Your software
My Mautic version is: 45_mautic-449
My PHP version is: 7.4.33
My Database type and version is: I dont know

Your problem
My problem is: 404 not found - http://localhost:8888/s/dashboard

These errors are showing in the log: Not found - The requested URL was not found on this server.

Steps I have tried to fix the problem: I’m a new user trying to install Mautic. I follow the following pass.
Download and Install MAMP:
Access the official MAMP website (https://www.mamp.info/) and download the latest version for macOS. Then, follow the instructions to install MAMP on your MacBook.

Download Mautic:
Visit the official Mautic website (https://www.mautic.org/) and download the latest version of Mautic in ZIP format.

Unzip the Mautic File:
After downloading, unzip the Mautic ZIP file.

Move Mautic Files to the MAMP Folder:
Navigate to the MAMP folder on your MacBook (usually located in /Applications/MAMP/). Then, open the “htdocs” folder and move all the Mautic files (from the previously unzipped folder) into the “htdocs” folder.

Start Apache and MySQL Servers:
Open the MAMP application on your MacBook and click the “Start Servers” button. MAMP will start the Apache and MySQL servers.

Database Configuration:
Open a web browser and access http://localhost:8888/phpMyAdmin/. This will open the phpMyAdmin interface, where you can configure the database for Mautic. Click on “New” in the left sidebar menu to create a new database. Give a name to the database (e.g., “mautic_db”) and click “Create.”

Mautic Installation:
Open a web browser and go to http://localhost:8888/ to start the Mautic installation. Follow the on-screen instructions to set up the database connection, create an administrative user, and complete the installation.

Access Mautic:
After completing the installation, you can access Mautic at http://localhost:8888/ in your web browser. Log in using the administrative user credentials you configured during the installation.

When I followed this step by step, I try to login and the error 404 The requested URL was not found on this server appears.

I have never tried to install Mautic locally. I expect your mautic.conf file needs to be edited to use your local host address.