I edit my website by logging into site ground. When I click “install and manage” and try to open the admin panel I get an error code:

Warning: call_user_func_array() expects parameter 1 to be a valid callback, function ‘_disable_block_editor_for_navigation_post_type’ not found or invalid function name in /home/customer/www/simplyhealthwithmarissa.com/public_html/wp-includes/class-wp-hook.php on line 307

This error code is also displayed at the top of the screen when you view the website.

What do I do and how do I get into my admin panel so that I can edit my website?