Unless it's a CDN problem, I am guessing a different ?config should be used. Here I suggest switching it to ?config=TeX-AMS_CHTML, which does load properly, although I do not really have an opinion on whether that's the configuration that should be recommended as the default.
The MathJax website suggests using the following URL if you want to load MathJax v2 in a
<script>
tag:But that looks to be broken -- in the browser, MathJax fails to load with:
As far as I can tell, it's because there is no such
.js
file underconfig/
for 2.7.9.Unless it's a CDN problem, I am guessing a different
?config
should be used. Here I suggest switching it to?config=TeX-AMS_CHTML
, which does load properly, although I do not really have an opinion on whether that's the configuration that should be recommended as the default.