Thanks for providing the credentials. I have logged in and I was able to edit the home page with no issue.
This is how I see it:
By the way, We recommend that you increase your memory allocated to PHP. To increase it, please edit your wp-config.php file and insert these lines:
define( 'WP_MEMORY_LIMIT', '256M' );
define( 'WP_MAX_MEMORY_LIMIT', '512M' );
You can add it before the line
/*That's all, stop editing! Happy Blogging. */
And also, please make sure that your PHP time out is at least 60s to avoid getting timed out when editing pages with several sections in it. To increase it, you might want to check this out: https://www.simplified.guide/php/increase-max-execution-time
We would loved to know if this has work for you. Thank you.