Block all IPs on website except cloudflare

Question

I'm using LiteSpeed Webserver on cPanel. I want to block all IPs except Cloudflare IP ranges.

This is my code (in my .htaccess file), however, it always results in a 403 forbidden error even when i'm accessing my website through cloudflare proxy:

# Cloudflare IPv4
allow from 173.245.48.0/20
allow from 103.21.244.0/22
allow from 103.22.200.0/22
allow from 103.31.4.0/22
allow from 141.101.64.0/18
allow from 108.162.192.0/18
allow from 190.93.240.0/20
allow from 188.114.96.0/20
allow from 197.234.240.0/22
allow from 198.41.128.0/17
allow from 162.158.0.0/15
allow from 104.16.0.0/13
allow from 104.24.0.0/14
allow from 172.64.0.0/13
allow from 131.0.72.0/22

# Cloudflare IPv6
allow from 2400:cb00::/32
allow from 2606:4700::/32
allow from 2803:f800::/32
allow from 2405:b500::/32
allow from 2405:8100::/32
allow from 2a06:98c0::/29
allow from 2c0f:f248::/32

# Deny all other 
deny from all

Tried rearranging the code, and verified that the IP ranges are correct, but it still does not work.