Site won’t load after RealFavconGenerator

Homepage, site, and dashboard won’t load; instead downloading PHP file containing:

<?php
/**
 * Front to the WordPress application. This file doesn't do anything, but loads
 * wp-blog-header.php which does and tells WordPress to load the theme.
 *
 * @package WordPress
 */

/**
 * Tells WordPress to load the WordPress theme and output it.
 *
 * @var bool
 */
define( 'WP_USE_THEMES', true );

/** Loads the WordPress Environment and Template */
require __DIR__ . '/wp-blog-header.php';

Contents of .htaccess below:

# BEGIN WordPress
# The directives (lines) between "BEGIN WordPress" and "END WordPress" are
# dynamically generated, and should only be modified via WordPress filters.
# Any changes to the directives between these markers will be overwritten.
AddHandler application/x-httpd-php70 .php
<IfModule mod_expires.c>
	ExpiresActive On
	ExpiresByType image/jpg "access plus 24 hours"
	ExpiresByType image/jpeg "access plus 24 hours"
	ExpiresByType image/gif "access plus 24 hours"
	ExpiresByType image/png "access plus 24 hours"
	ExpiresByType text/css "access plus 24 hours"
	ExpiresByType application/pdf "access plus 1 week"
	ExpiresByType text/javascript "access plus 24 hours"
	ExpiresByType text/html "access plus 5 minutes"
	ExpiresByType image/x-icon "access plus 1 year"
	ExpiresDefault "access plus 24 hours"
</IfModule>
Options -Indexes
<IfModule mod_headers.c>
	Header set X-Endurance-Cache-Level "2"
	Header set X-nginx-cache "WordPress"
</IfModule>
<IfModule mod_rewrite.c>
RewriteEngine On
RewriteRule .* - [E=HTTP_AUTHORIZATION:%{HTTP:Authorization}]
RewriteBase /
RewriteRule ^index\.php$ - [L]
RewriteRule ^android-chrome-192x192\.png /wp-content/uploads/fbrfg/android-chrome-192x192.png [QSA,L]
RewriteRule ^android-chrome-256x256\.png /wp-content/uploads/fbrfg/android-chrome-256x256.png [QSA,L]
RewriteRule ^apple-touch-icon\.png /wp-content/uploads/fbrfg/apple-touch-icon.png [QSA,L]
RewriteRule ^browserconfig\.xml /wp-content/uploads/fbrfg/browserconfig.xml [QSA,L]
RewriteRule ^favicon-16x16\.png /wp-content/uploads/fbrfg/favicon-16x16.png [QSA,L]
RewriteRule ^favicon-32x32\.png /wp-content/uploads/fbrfg/favicon-32x32.png [QSA,L]
RewriteRule ^favicon\.ico /wp-content/uploads/fbrfg/favicon.ico [QSA,L]
RewriteRule ^mstile-150x150\.png /wp-content/uploads/fbrfg/mstile-150x150.png [QSA,L]
RewriteRule ^safari-pinned-tab\.svg /wp-content/uploads/fbrfg/safari-pinned-tab.svg [QSA,L]
RewriteRule ^site\.webmanifest /wp-content/uploads/fbrfg/site.webmanifest [QSA,L]
RewriteCond %{REQUEST_FILENAME} !-f
RewriteCond %{REQUEST_FILENAME} !-d
RewriteRule . /index.php [L]
</IfModule>

# END WordPress