I'm getting this error when loading my page. I have 5.0.3 of WordPress. 

Uncaught SyntaxError: missing ) after argument list        :formatted:1845 

The link redirect to this code: <script type='text/javascript'>
( 'fetch' in window ) || document.write( '<script src="https://learn.blueworkforce.com/wp-includes/js/dist/vendor/wp-polyfill-fetch.min.js' defer onload='"></scr' + 'ipt>' );( document.contains ) || document.write( '<script src="https://learn.blueworkforce.com/wp-includes/js/dist/vendor/wp-polyfill-node-contains.min.js' defer onload='"></scr' + 'ipt>' );( window.FormData && window.FormData.prototype.keys ) || document.write( '<script src="https://learn.blueworkforce.com/wp-includes/js/dist/vendor/wp-polyfill-formdata.min.js' defer onload='"></scr' + 'ipt>' );( Element.prototype.matches && Element.prototype.closest ) || document.write( '<script src="https://learn.blueworkforce.com/wp-includes/js/dist/vendor/wp-polyfill-element-closest.min.js' defer onload='"></scr' + 'ipt>' );
</script>