Issue with .htaccess file redirect

I am trying to make my subdomain work and redirect to skykontrol.machinesloveme.com but I can't. The file redirects successfully to "https://ift.tt/oqOGv6H" but it shows "Internal Server Error" on this site. Without the .htaccess file it works just as expected. I don't now why it fails. Can you help me???

Also I require that the .php files can be accessed without the extension. I believe I got this right. Anyways, here is my .htaccess file. I know is a newby question but the help will be highly appreciated.

RewriteEngine On
RewriteCond %{HTTP_HOST} !=skykontrol.machinesloveme.com
RewriteCond %{THE_REQUEST} !service [NC]
RewriteCond %{HTTPS} off
RewriteCond %{REQUEST_URI} !^/[0-9]+\..+\.cpaneldcv$
RewriteCond %{REQUEST_URI} !^/\.well-known/pki-validation/[A-F0-9]{32}\.txt(?:\ Comodo\ DCV)?$
RewriteCond %{REQUEST_URI} !^/\.well-known/acme-challenge/[0-9a-zA-Z_-]+$
RewriteCond %{REQUEST_URI} !^/\.well-known/cpanel-dcv/[0-9a-zA-Z_-]+$
RewriteCond %{REQUEST_URI} !^/\.well-known/pki-validation/(?:\ Ballot169)?
RewriteRule ^(.*)$ https://%{HTTP_HOST}%{REQUEST_URI} [L,R=301]
RewriteCond %{REQUEST_URI} !^/[0-9]+\..+\.cpaneldcv$
RewriteCond %{REQUEST_URI} !^/\.well-known/pki-validation/[A-F0-9]{32}\.txt(?:\ Comodo\ DCV)?$
RewriteCond %{REQUEST_URI} !^/\.well-known/acme-challenge/[0-9a-zA-Z_-]+$
RewriteCond %{REQUEST_URI} !^/\.well-known/cpanel-dcv/[0-9a-zA-Z_-]+$
RewriteCond %{REQUEST_URI} !^/\.well-known/pki-validation/(?:\ Ballot169)?
RewriteRule ^/?$ "https\:\/\/skykontrol.\machinesloveme\.com\/login" [R=301,L]
RewriteCond %{HTTP_HOST} ^www\.(.+)
RewriteCond %{HTTPS}s/%1 ^(on(s)|offs)/(.+)
RewriteCond %{REQUEST_URI} !^/\.well-known/acme-challenge/[0-9a-zA-Z_-]+$
RewriteCond %{REQUEST_URI} !^/\.well-known/cpanel-dcv/[0-9a-zA-Z_-]+$
RewriteCond %{REQUEST_URI} !^/\.well-known/pki-validation/(?:\ Ballot169)?
RewriteCond %{REQUEST_URI} !^/\.well-known/pki-validation/[A-F0-9]{32}\.txt(?:\ Comodo\ DCV)?$
RewriteRule ^ http%2://%3%{REQUEST_URI} [L,R=301]
RewriteCond %{HTTP_HOST} ^skykontrol\.machinesloveme\.com$ [OR]
RewriteCond %{HTTP_HOST} ^www\.skykontrol\.machinesloveme\.com$
RewriteCond %{REQUEST_URI} !^/\.well-known/acme-challenge/[0-9a-zA-Z_-]+$
RewriteCond %{REQUEST_URI} !^/\.well-known/cpanel-dcv/[0-9a-zA-Z_-]+$
RewriteCond %{REQUEST_URI} !^/\.well-known/pki-validation/[A-F0-9]{32}\.txt(?:\ Comodo\ DCV)?$
RewriteCond %{REQUEST_URI} !^/\.well-known/pki-validation/(?:\ Ballot169)?
RewriteRule ^/?$ "https\:\/\/skykontrol.\machinesloveme\.com\/login" [R=301,L]
RewriteCond %{REQUEST_FILENAME} !-f
RewriteCond %{REQUEST_URI} !^/\.well-known/acme-challenge/[0-9a-zA-Z_-]+$
RewriteCond %{REQUEST_URI} !^/\.well-known/cpanel-dcv/[0-9a-zA-Z_-]+$
RewriteCond %{REQUEST_URI} !^/\.well-known/pki-validation/(?:\ Ballot169)?
RewriteCond %{REQUEST_URI} !^/\.well-known/pki-validation/[A-F0-9]{32}\.txt(?:\ Comodo\ DCV)?$
RewriteRule ^([^\.]+)$ $1.php [NC,L]

<Files 403.shtml>
order allow,deny
allow from all
</Files>

Thanks

Already tried with the file, but it shows "Internal Server Error". Also I don't now why the files automatically is populated with some trash that I didn't code.

source https://stackoverflow.com/questions/76782552/issue-with-htaccess-file-redirect