Reply To: I can not edit the main page of the site

https://gyazo.com/0cf1796126e54cd0e7b5c566b51334b1
This error says that you don’t have enough memory on your server and it is a very common WordPress problem. Luckily, there is a very quick way to solve this by increasing the PHP memory limit on your server. We suggest you to contact your hosting company for help in this question. Here is an article about this error that should help you https://www.wpbeginner.com/wp-tutorials/fix-wordpress-memory-exhausted-error-increase-php-memory/