Fatal error: Uncaught Error while entering the dashboard and in some shop pages

recently my WordPress website https://authouse.ir/ faced an error

Fatal error: Uncaught Error: Value of type null is not callable in /home/sywwqmum/public_html/wp-includes/load.php:1 Stack trace: #0 /home/sywwqmum/public_html/wp-settings.php(35): require() #1 /home/sywwqmum/public_html/wp-config.php(96): require_once(‘/home/sywwqmum/…’) #2 /home/sywwqmum/public_html/wp-load.php(50): require_once(‘/home/sywwqmum/…’) #3 /home/sywwqmum/public_html/wp-blog-header.php(13): require_once(‘/home/sywwqmum/…’) #4 /home/sywwqmum/public_html/index.php(17): require(‘/home/sywwqmum/…’) #5 {main} thrown in /home/sywwqmum/public_html/wp-includes/load.php on line 1

on some pages like :

https://authouse.ir/product-category/irrigation-package/page/2/

when I refresh the page by URL the error is hidden.. but from the woocomerce button, it can’t find the page..

furthermore, while entering the dashboard even by authouse.ir/wp-login.php this error is shown.

I’m wondering if u can help me…

I deactivated all plugins by the way of the host server..also I improved the PHP version

all did not work….

The page I need help with: [log in to see the link]