All pages send me to this error page

wp-admin/includes/class-wp-list-table.php

my wordpress install has this file.replacing this should fix this warning.login to FTP/file manager and see if you have this file there. you can replace this by download fresh wordpress too.

if your website is offline you can deactivate the theme by renaming it to sensible-wp.HOLD .

wp-content
   Themes
    sensibe-wp

WordPress will revert to default theme. your website will be online and you can fix your existing theme

It does not have a FTP/file manager. How can I get to this page to edit it through my dashboard?

switch to another theme.

When I try to switch to another theme, it gives me this error again

Warning: require_once(/home/tgapw/www7/wp-admin/includes/class-wp-list-table.php) [function.require-once]: failed to open stream: No such file or directory in /home/tgapw/www7/wp-content/themes/sensible-wp/panel/class-tgm-plugin-activation.php on line 2127

get FTP acess then, no other way to fix it, ask your webhost or trying logging in at yourwebsite.com:2082 default login for cpanel

Thank you!

Do you know specifically what this error addresses? Would deleting the theme file fix this?

I can’t access the switch themes page or anything ??
Currently trying to get the FTP information.