URL rewriting 500 error

Question

I am beginner in rewriting url. I tried to do simple rewrite but it goes badly. I don't know why. Searched for answers but did not find anything.

Error I am encountering:

500 internal server error | Additionally, a 404 Not Found error was encountered while trying to use an ErrorDocument to handle the request.

My htaccess file is in /admin/.htaccess And I have another in /.htaccess - in this I have this code: Options -Indexes

# Rewriting URLs
RewriteEngine On

RewriteRule ^custom dashboard.php [NC, L]

Thank you for your help

Answer 1

Try without space in [NC, L]:

# Rewriting URLs
RewriteEngine On

RewriteRule ^custom dashboard.php [NC,L]