Hello Toufiq,
I see it is working on your server. There are some differences between my server and yours. You have: PHP 7.4.32, Litespeed server and another database collation.
I am using PHP 8.1 and Apache.
Maybe it is the PHP version, so on my site I installed PHP 7.4.32 and then SP PageBuilder is working correct: it shows the pages in the backend. (Yes!)
And I can edit them.
But I have installed Joomla 4 and like to use newer PHP versions like 8.1 or 8.2.
Besides that: Your PHP version, 7.4.32, is only receiving security fixes from the PHP project at this time.
Question: can you scale it up to PHP 8.1?