Wordpress downloads the page and does not display

Good afternoon! I have the following problem, some pages in the WP control panel are downloaded instead of loading normally when I try to access them. This happened after I edit the .htaccess, I've restored the same and nothing to solve it.

Here's an example of what's happening:

When I click on Add page the page does not load but low a file called Edit.php.

.htaccess:

BEGIN WordPress
<IfModule mod_rewrite.c>
RewriteEngine On
RewriteBase /
RewriteRule ^index\.php$ - [L]
RewriteCond %{REQUEST_FILENAME} !-f
RewriteCond %{REQUEST_FILENAME} !-d
RewriteRule . /index.php [L]
</IfModule>
END WordPress

Thanks in advance.