.htaccess File Causes Internal Server Error Message

Hello,

I just purchased a license after I successfully set everything up on a local server. I then uploaded Perch to my website and everything worked fine. I wanted to change the URLs of the blog posts. So I opened the .htaccess file that was already on my server and added the rules from this page:

https://docs.grabaperch.com/video/v3/htaccess-rewrites/

When I did so and re-uploaded it, I got a 500 Internal Server Error on every page of my site. I cannot even access Perch dashboard.

I have went through the .htaccess and one by one removed each rule and nothing changed. The only way I can access my site and Perch dashboard in the browser is to completely delete the .htaccess file. What is strange about the situation is that I already had an .htaccess file sitting on my server with the rule to not display the .php extension, and that worked fine.

.htaccess file:

RewriteEngine on
# Redirect to PHP if it exists.
# e.g. example.com/foo will display the contents of example.com/foo.php
RewriteCond %{REQUEST_FILENAME} !-f
RewriteCond %{REQUEST_FILENAME} !-d
RewriteCond %{REQUEST_FILENAME}.php -f 
RewriteRule ^(.+)$ $1.php [L,QSA]

RewriteRule ^blog/([a-zA-Z0-9-/]+)$ /blog/post.php?s=$1 [L]

# php -- BEGIN cPanel-generated handler, do not edit
# Set the “ea-php70” package as the default “PHP” programming language.
<IfModule mime_module>
  AddType application/x-httpd-ea-php70___lsphp .php .php7 .phtml
</IfModule>
# php -- END cPanel-generated handler, do not edit

Perch diagnostics summary:

Perch: 3.1.2, PHP: 7.0.31, MySQL: mysqlnd 5.0.12-dev - 20150407 - $Id: b5c5906d452ec590732a93b051f3827e02749b83 $, with PDO Server OS: Linux, litespeed Installed apps: content (3.1.2), assets (3.1.2), categories (3.1.2), perch_blog (5.6.1) App runtimes: <?php $apps_list = [ 'perch_blog' ]; PERCH_LOGINPATH: /perch PERCH_PATH: /home/rrwuxefn/public_html/azureholistic.com/perch PERCH_CORE: /home/rrwuxefn/public_html/azureholistic.com/perch/core PERCH_RESFILEPATH: /home/rrwuxefn/public_html/azureholistic.com/perch/resources Image manipulation: GD PHP limits: Max upload 64M, Max POST 64M, Memory: 256M, Total max file upload: 64M F1: 3b606135b33e6a102526838f4152a807 Resource folder writeable: Yes HTTP_HOST: azureholistic.com DOCUMENT_ROOT: /home/rrwuxefn/public_html/azureholistic.com REQUEST_URI: /perch/core/settings/diagnostics/ SCRIPT_NAME: /perch/core/settings/diagnostics/index.php