Generated output looks like line noise

Your project looks very promising. If I can get it working, I will teach a class on it at my hackerspace.

I have started trying to use it today.

I ran generate, with settings to generate files to a local directory.

Then I looked at the output in a Chrome browser.

It looks like this:

?í?{s?±/?·?)JD^?=è÷?$à?eé? s?B”?‰￠?140#6?ù3$(k??f?/3o D–?ùY3ìé?we?;3??§?ê???í×nú_wg?>?\7?_?′óè?—nò?7?ó?ù”úy?è?fwuà??ysY?c7??×???=?á?o￠úà^??×íéán??Y.?=μ′?÷í????]?óó?v7?′‘ü8v3ù????h3wíi??t3ùk·n?ó??zq9?ú7]·—§ó?_>=91o^^???“·—ó“??|ú|3Y?–

In emacs, it looks like

???{s?/???)J?^?=???$??e??
s?B????140#6??3$(k??f?/?? Ж?????we?;???????????n?_wg?>?\7?_???臗n?7???”?y???fwu????s??c7?????=???o???^??????n?Y.?=???????]???v7????8v??????h3w?i?t??k?n???zq9??7]????_>=9??^^?????

Is there some encoding setting somewhere?

Ubuntu 18.04
vanilla MySQL
vanilla PHP
today’s WordPress.
Today’s SIMPLY Static.

The page I need help with: [log in to see the link]