If you completely deleted the previous WP installation, anything relating to the security plugin should be gone. However, review the contents of .htaccess file in public root for any remnant security rules. If you’re not sure, temporarily rename the file to negate all rules. Also rename the new wp-config.php file so WP can create its own during the installation process.
You will still need proper database credentials. See if there is any way in your hosting account to create DB users that is separate from phpMyAdmin. If not, your hosting account user/password might work. In some cases the account user name has the DB or domain name appended to it to make up the complete user name. The specifics should be in your hosting account somewhere.
The DB_HOST value can sometimes be rather obscure though ‘localhost’ often works. See https://wordpress.org/support/article/editing-wp-config-php/#set-database-host for other possible names. Again, the specifics should be in your hosting account somewhere, or in its knowledge base.
Does you hosting account have a one click WP install option? You’ll have better luck using it if it’s available. You may not need to know any of the above information this way.
The 403 error is usually due to improper folder and file permissions. Usually they should be 644 for files and 755 for folders. In some instances you might need 664 and 775 if the user WP runs as is not the file/folder owner. Another common cause for 403 errors is the request runs afoul of mod_security running on the server. Your host would likely need to fix mod_security issues for you.
Again, a one click install option should let you avoid such issues.
Hello
If you are using a local environment, then you could try reinstalling your DataBase Server or all the development server, ex.: reinstall xampp, local by Flywheel, or similar program.
If you need some information at the database you could try to set a root password (google: reset mysql root password), then update at the Phpmyadmin directory, the config.inc.php file with the root user password inline 21.
If you are using a hosted server, then you could try to install your WordPress from the Cpanel “Softaculous Apps Installer” “WordPress” “Install Now”.
I hope this can be of use.
Best regards from QVcreative.
