Fatal error: Uncaught TypeError: Unsupported operand types: string + int in D:\InetPub\vhosts\beingreasonable.com\httpdocs\wp-content\plugins\modern-footnotes\modern-footnotes.php:172 Stack trace: #0 D:\InetPub\vhosts\beingreasonable.com\httpdocs\wp-includes\shortcodes.php(434): modern_footnotes_func(Array, 'In his famous w...', 'mfn') #1 [internal function]: do_shortcode_tag(Array) #2 D:\InetPub\vhosts\beingreasonable.com\httpdocs\wp-includes\shortcodes.php(273): preg_replace_callback('/\\[(\\[?)(mfn)(?...', 'do_shortcode_ta...', '\t\t<div data-ele...') #3 D:\InetPub\vhosts\beingreasonable.com\httpdocs\wp-includes\class-wp-hook.php(324): do_shortcode('\t\t<div data-ele...') #4 D:\InetPub\vhosts\beingreasonable.com\httpdocs\wp-includes\plugin.php(205): WP_Hook->apply_filters('\t\t<div data-ele...', Array) #5 D:\InetPub\vhosts\beingreasonable.com\httpdocs\wp-includes\post-template.php(256): apply_filters('the_content', '<p>By Prof. T. ...') #6 D:\InetPub\vhosts\beingreasonable.com\httpdocs\wp-content\themes\hello-elementor\template-parts\single.php(24): the_content() #7 D:\InetPub\vhosts\beingreasonable.com\httpdocs\wp-includes\template.php(812): require('D:\\InetPub\\vhos...') #8 D:\InetPub\vhosts\beingreasonable.com\httpdocs\wp-includes\template.php(745): load_template('D:\\InetPub\\vhos...', false, Array) #9 D:\InetPub\vhosts\beingreasonable.com\httpdocs\wp-includes\general-template.php(206): locate_template(Array, true, false, Array) #10 D:\InetPub\vhosts\beingreasonable.com\httpdocs\wp-content\themes\hello-elementor\index.php(20): get_template_part('template-parts/...') #11 D:\InetPub\vhosts\beingreasonable.com\httpdocs\wp-includes\template-loader.php(106): include('D:\\InetPub\\vhos...') #12 D:\InetPub\vhosts\beingreasonable.com\httpdocs\wp-blog-header.php(19): require_once('D:\\InetPub\\vhos...') #13 D:\InetPub\vhosts\beingreasonable.com\httpdocs\index.php(17): require('D:\\InetPub\\vhos...') #14 {main} thrown in D:\InetPub\vhosts\beingreasonable.com\httpdocs\wp-content\plugins\modern-footnotes\modern-footnotes.php on line 172