Undefined property error

One of my sites (3.10.1) with pagebuilder pro is now throwing a 404 page not found on all pages. Admin looks fine and all extensions are up to date. The URL is https://www.rowlandandassociates.co.uk and the error log entry reads: rowlandandassociates.co.uk [Mon Sep 13 12:24:07 2021] [error] [client 82.8.205.88:0] AH01071: Got error 'PHP message: PHP Notice: Undefined property: stdClass::$section_height_option in /home/sites/6a/6/6b45341d7e/public_html/components/com_sppagebuilder/layouts/row/css.php on line 32PHP message: PHP Warning: Creating default object from empty value in /home/sites/6a/6/6b45341d7e/public_html/libraries/cegcore2/libs/helper.php on line 22PHP message: PHP Warning: Creating default object from empty value in /home/sites/6a/6/6b45341d7e/public_html/libraries/cegcore2/libs/helper.php on line 22PHP message: PHP Warning: Creating default object from empty value in /home/sites/6a/6/6b45341d7e/public_html/libraries/cegcore2/libs/helper.php on line 22PHP message: PHP Warning: Creating default object from empty value in /home/sites/6a/6/6b45341d7e/public_html/libraries/cegcore2/libs/helper.php on line 22PHP message: PHP Warning: Creating default object from empty value in /home/sites/6a/6/6b45341d7e/pu