Numbas Error: Numbas couldn't start because the file
mathjax-hooks was not loaded. Check that it's included in
scripts.js.
at Numbas.checkAllScriptsLoaded (https://numbas.mathcentre.ac.uk/test-yourself/mathcentre-product-rule-practice/scripts.js:205:23)
at HTMLDocument.
(https://numbas.mathcentre.ac.uk/test-yourself/mathcentre-product-rule-practice/:60:16)
at c (https://numbas.mathcentre.ac.uk/test-yourself/mathcentre-product-rule-practice/scripts.js:12999:26036)
at Object.fireWith [as resolveWith] (https://numbas.mathcentre.ac.uk/test-yourself/mathcentre-product-rule-practice/scripts.js:12999:26840)
at Function.ready (https://numbas.mathcentre.ac.uk/test-yourself/mathcentre-product-rule-practice/scripts.js:12999:3305)
at HTMLDocument.q (https://numbas.mathcentre.ac.uk/test-yourself/mathcentre-product-rule-practice/scripts.js:12999:717)