I have a plain install of the JBCorporation template. As soon as Joomla updates itself, the compile less to css functionality breaks. Prior to the update, it all worked as expected. The version of Joomla is 3.9.18. It works fine on Joomla 3.9.16. The template was installed with the site Quickstart. There have been no third party or other plugins installed. It's as vanilla as it gets. The error that I am seeing in the console when this fails is this one-
jquery.min.js?7b06fcefe791254739a51ed0660b3389:2 POST http://XXXXXXXXXX.com/bamboo/index.php?template=corporation&tmpl=ajax&function=ajax-compiler 500 (Internal Server Error)
Substitute the XXXX's for my domain name.
Your help is appreciated!