Error internal server error

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PHP

Apache

deployment

Hi 
I writing .htacess for website but add <pre>RewriteRule

and run web error

Internal Server Error

Convert link: touchme.vn/me?i=admin --> touchme.vn/me/admin

I sent systax:

RewriteEngine ON

RewriteCond %{THE_REQUEST} /([^.]+)\.php [NC]
RewriteRule ^ /%1 [NC,L,R]
RewriteCond %{REQUEST_FILENAME}.php -f
RewriteRule ^ %{REQUEST_URI}.php [NC,L]
RewriteRule ^/me/([0-9a-zA-Z_-]+) /me?i=$1 [NC,L]
RewriteRule ^dev/(.*)$ https://touchme.vn/me$1 [L,R=301,NC]
RewriteRule ^touchme.vn/me/([0-9a-zA-Z_-]+) https://touchme.vn/me?i=$1 [NC,L]
#RewriteRule ^(.*)$ /me.php?/$1 [L]
RewriteRule ^([^/]*)$ /me.php?i=$1 [NC,L]

Apache 2.4
Please fix help me
Thank you

What I have tried:

Hi 
I writing .htacess for website but add <pre>RewriteRule

and run web error

Internal Server Error

Convert link: touchme.vn/me?i=admin --> touchme.vn/me/admin

I sent systax:

RewriteEngine ON

RewriteCond %{THE_REQUEST} /([^.]+)\.php [NC]
RewriteRule ^ /%1 [NC,L,R]
RewriteCond %{REQUEST_FILENAME}.php -f
RewriteRule ^ %{REQUEST_URI}.php [NC,L]
RewriteRule ^/me/([0-9a-zA-Z_-]+) /me?i=$1 [NC,L]
RewriteRule ^dev/(.*)$ https://touchme.vn/me$1 [L,R=301,NC]
RewriteRule ^touchme.vn/me/([0-9a-zA-Z_-]+) https://touchme.vn/me?i=$1 [NC,L]
#RewriteRule ^(.*)$ /me.php?/$1 [L]
RewriteRule ^([^/]*)$ /me.php?i=$1 [NC,L]

Apache 2.4
Please fix help me
Thank you