Read More Settings Pages Printing Critical Error Message

“There has been a critical error on this website. Please check your site admin email inbox for instructions.”

Error Details
=============
An error of type E_ERROR was caused in line 161 of the file /home/customer/www/vintageheavymetal.com/public_html/wp-content/plugins/expand-maker/files/ReadMoreAdminHelper.php. Error message: Uncaught ArgumentCountError: Too few arguments to function ReadMoreAdminHelper::upgradeButton(), 0 passed in /home/customer/www/vintageheavymetal.com/public_html/wp-content/plugins/expand-maker/views/readMorePagesView.php on line 54 and exactly 1 expected in /home/customer/www/vintageheavymetal.com/public_html/wp-content/plugins/expand-maker/files/ReadMoreAdminHelper.php:161
Stack trace:
#0 /home/customer/www/vintageheavymetal.com/public_html/wp-content/plugins/expand-maker/views/readMorePagesView.php(54): ReadMoreAdminHelper::upgradeButton()
#1 /home/customer/www/vintageheavymetal.com/public_html/wp-content/plugins/expand-maker/classes/ReadMorePages.php(12): require_once('/home/customer/...')
#2 /home/customer/www/vintageheavymetal.com/public_html/wp-content/plugins/expand-maker/classes/ReadMoreInit.php(116): ReadMorePages->mainPage()
#3 /home/customer/www/vintageheavymetal.com/public_html/wp-includes/class-wp-hook.php(307): ReadMoreInit->readMoreMainMenu('')
#4 /home/customer/www/vintageheavymetal.com/public_html/wp-includes/class-wp-hook.php(331): WP_Hook->apply_filters('', Array)
#5 /home/customer/www/vintageheavymetal.com/public_html/wp-includes/plugin.php(474): WP_Hook->do_action(Array)
#6 /home/customer/www/vintageheavymetal.com/public_html/wp-admin/admin.php(259): do_action('toplevel_page_r...')
#7 {main}
  thrown