Hi Want to stick my sidebar at 500px from top how to achieve it

any work around to fix this

I am not using any extra plugin
I have changed my site url
I am trying to use reverse proxy here Issue is only occuring when I am using reverse proxy

If I am keeping site url and home url same than Its working fine but for reverse proxy I need both urls to be different

I have already mailed you issue and the login details

done above steps of memory allocation and php version update
still getting the same error

getting this warning

Warning: An unexpected error occurred. Something may be wrong with WordPress.org or this server’s configuration. If you continue to have problems, please try the support forums. (WordPress could not establish a secure connection to WordPress.org. Please contact your server administrator.) in C:\xampp\htdocs\apna\wp-includes\update.php on line 443