504 Page Error with Few Website URLs - WordPress [closed]

Do you see anything wrong with my settings?

I currently manage my own website hosting using AWS EC2 instance.

I am facing an issue only with several website URLs returning error 504, which I suspect is related to the mod_rewrite settings in .htaccess

mod_rewrite settings

The URLs:

https://www.trenddr.com/sell-on-trenddr/

https://www.trenddr.com/return-policy/

https://www.trenddr.com/privacy-notice/

https://www.trenddr.com/daily-sale/