“In case you are on Ubuntu, edit the file /etc/apache2/apache2.conf (here we have an example of /var/www):

<Directory /var/www/>
Options Indexes FollowSymLinks
AllowOverride None
Require all granted
</Directory>
and change it to;

<Directory /var/www/>
Options Indexes FollowSymLinks
AllowOverride All
Require all granted
</Directory>
then,

sudo service apache2 restart
You may need to also do sudo a2enmod rewrite to enable module rewrite.”

I’m having the exact same problem,

this is the first time I’m having trouble with this after doing it many times. I think it’s because of a change in the process of the one-click wordpress install… It now asks you to write the domain/subdomain name in the terminal when you’re accessing root for the first time.

This is a web server error. I would recommend starting by checking your web server’s error logs in /var/log/apache2/error.log There should be additional details there that will assist us in tracking down the issue. It is likely that your web server is looking for your files in the wrong place when it receives a request.

Same problem unfortunately – editing my apache conf isn’t changing much unfortunately

What solved it for me (wordpress image based on ubuntu 18) was going to Settings -> Permalinks, and simply pressing save.

got the answer from https://wordpress.stackexchange.com/questions/253245/wordpress-migration-getting-404-errors-only-home-page-works