I uploaded the .htaccess code, and because of it, pages are downloaded. What's the matter?

Question

PHP

Pages of the form page.html, over time it was necessary to use php-code on these pages. Changing the extension from page.html to page.php is not an option. In the search engine in high positions of the page.
As a result, I found a code that allows you to process php on html pages.
Together with all the code, it turned out like this:

<IfModule mod_rewrite.c>
Options +FollowSymLinks
RewriteCond %{HTTP_HOST} ^www\.(.*)$
RewriteRule ^(.*)$ http://%1/$1 [L,R=301]

AddType application/x-httpd-php .php .htm .html



RewriteEngine On
RewriteCond %{REQUEST_FILENAME} !-d
RewriteCond %{REQUEST_FILENAME}\.html -f
RewriteRule ^(.*)$ $1.html


RewriteEngine on
RewriteBase /
RewriteCond %{THE_REQUEST} ^[A-Z]{3,9}\ /([^.]+)\.html\ HTTP
RewriteRule ^([^.]+)\.html$ http://vash-master.tv/$1 [R=301,L]
RewriteCond %{REQUEST_URI} !(\.[^./]+)$
RewriteCond %{REQUEST_fileNAME} !-d
RewriteCond %{REQUEST_fileNAME} !-f
RewriteRule (.*) /$1.html

RewriteCond %{REQUEST_URI} /index
RewriteRule ^(.*)$ http://vash-master.tv/ [R=301,L]

But the problem is that after adding this line, you open any page and just starts downloading it, instead of opening it. What's the problem? I don't understand.
Hosting hc.ru, if it matters. Maybe something in the code conflicts? Tell me please.
PS Without this line, everything else works fine.

Answer 1

RemoveHandler .html .htm 
AddType application/x-httpd-php .php .htm .html .phtml