Borge

I could think 2 common fix on that issue.

1. increasing memory limit.
2. check in your settings>media>upload path should only be wp-contents/uploads. anything other than that like home/user/public_html shoud be remove.

Kindly check those.

what have you made so far after activating the SSL?

htaccess changes?
database changes?
dashboard settings changes?

What is your site URL?

I really cant tell. Way to say is to check the server access logs.

when accessing the website it says

“Domain petramusilova.cz
is parking at CZECHIA.COM”

Reasons could be
1. The name servers are incorrect
2. IP address on A record for both www and naked is incorrect
3. The index.php initially created by your hosting provider was not override by the index.php carried by the zip file you have extracted.

Please communicate with your hosting provider and mention to them these following circumstances.

Hope that helps 🙂

what kind of server are you using? Shared or VPS? Linux Cpanel or Plesk?

Could be memory issue. Have you checked the error_logs in your Cpanel with HG?

If not try checking it or let HG Support to increase the memory limit.

Changing core files “they said” is not good. But I guess, this is the only option you got to resolve that issue since you’ve got 2GB RAM on your virtual server.

Go to wp-includes/default-constants.php

change this code

if ( !defined('WP_MEMORY_LIMIT') ) {
if ( is_multisite() ) {
define('WP_MEMORY_LIMIT', '128M');
} else {
define('WP_MEMORY_LIMIT', '256M');
}
}

if ( ! defined( 'WP_MAX_MEMORY_LIMIT' ) ) {
define( 'WP_MAX_MEMORY_LIMIT', '512M' );
}

Let me know if that works for you.