.htaccess, hide sub directories - .htaccess

Question

I am new to learning how .htaccess works and I am struggling on getting it to work how I want it to.
Here is my current .htaccess file:
RewriteOptions inherit
#ErrorDocument 404 https://tsrvtc.com/_pages/404page.html
#ErrorDocument 500 https://tsrvtc.com/_pages/500page.html
#ErrorDocument 403 https://tsrvtc.com/_pages/403page.html
<IfModule mod_rewrite.c>
RewriteBase /
RewriteEngine on
RedirectMatch 301 ^/?$ https://www.tsrvtc.com/index
RewriteCond %{REQUEST_FILENAME} !-d
RewriteCond %{REQUEST_FILENAME}\.html -f
RewriteRule ^(.*)$ $1.html
RewriteCond %{REQUEST_FILENAME} !-d
RewriteCond %{REQUEST_FILENAME}\.php -f
RewriteRule ^(.*)$ $1.php
RewriteCond %{THE_REQUEST} ^[A-Z]{3,}\s/+_pages/([^\s]+) [NC]
RewriteRule ^ %1 [R=301,L]
RewriteCond %{REQUEST_FILENAME} !-f
RewriteRule (?!^_pages/)^(.*)$ /_pages/$1 [L,NC]
#
RewriteCond %{THE_REQUEST} ^[A-Z]{3,}\s/+vtc_manager/([^\s]+) [NC]
RewriteRule ^ %1 [R=301,L]
RewriteCond %{REQUEST_FILENAME} !-f
RewriteRule (?!^vtc_manager/)^(.*)$ /vtc_manager/$1 [L,NC]
RewriteCond %{HTTP_HOST} ^tsrvtc\.com$ [NC]
RewriteRule ^(.*)$ http://www.tsrvtc.com/$1 [R=301,L]
</IfModule>
AuthName "public"
AuthUserFile "/home/tsrvtcco/.htpasswds/public_html/passwd"
It currently works hiding the _pages directory in the url but when I try to hide the vtc_managerm directory then goto the page within that directory it redirects to my domain name and puts index.php at the end. The I am given this error: https://gyazo.com/0cc504188657beafd2042d6332e4bd9b
Here is the layout of the directories:
public_html
_pages
vtc_manager
Any assistance will be greatly appreciated.

Answer 1

The error due to misconfigured .htaccess. When you try to dig into it, the apache log shows this error:
Request exceeded the limit of 10 internal redirects due to probable
configuration error. Use 'LimitInternalRecursion' to increase the
limit if necessary. Use 'LogLevel debug' to get a backtrace.
You were making infinite redirects, by these conditions and rules:
1. RewriteCond %{REQUEST_FILENAME} !-f
2. RewriteRule (?!^_pages/)^(.*)$ /_pages/$1 [L,NC]
3. RewriteCond %{REQUEST_FILENAME} !-f
4. RewriteRule (?!^vtc_manager/)^(.*)$ /vtc_manager/$1 [L,NC]
When you made a request / and file is not found in the root directory, then the first condition (1.) meets and rule meets. The request uri is rewritten to /_pages/. The rewritten request is handled, then handed back to the URL parsing engine again. The second attempt, the first condition (1.) meets, but the rule pattern (2.) does not meet. However, the second condition (3.) meets and rule (4.) meets. The request uri is then rewritten to /vtc_manager/_pages/. Then rewritten request is handled and so on.
You should fully read the documentation of mod_rewrite module and RewriteRule Flags to understand what you are trying to do.