Error thrown

Failed opening required '/usr/www/users/died119/Diedrichs-WP/wp-content/plugins/backwpup/vendor/composer/../amphp/amp/lib/functions.php' (include_path='/usr/www/users/died119/Diedrichs-WP/wp-content/plugins/backwpup/vendor/pear/pear_exception:/usr/www/users/died119/Diedrichs-WP/wp-content/plugins/backwpup/vendor/pear/console_getopt:/usr/www/users/died119/Diedrichs-WP/wp-content/plugins/backwpup/vendor/pear/pear-core-minimal/src:/usr/www/users/died119/Diedrichs-WP/wp-content/plugins/backwpup/vendor/pear/archive_tar:.:/usr/local/lib/php/')