Local Dev .theme file not loading I'm working on a local development environment (via Acquia Dev Desktop).  Our theme is a subtheme of the Stack theme.

In this situation, I'm making changes to my .theme file, but they don't seem to be loading at all.  If I make the same changes to the stack.theme, they load and work as expected.

I've ensured I'm using function &lt;subtheme&gt;_theme_suggestions_page_alter but still no luck.  There is nothing in the error.log either.
Got it fixed on my local environment by putting the base theme name in quotes and then clearing the cache.
Changed base theme: classy to base theme: &quot;classy&quot;.
Also, check for a single quote on your theme's description. If you find it, make sure you put the whole description in quotes.