Error latest Wordpress update
We've confirmed that it's a backward compatibility break in WordPress 5.1. We're reporting it to the WordPress core team.
For now, please log into the admin and revert back to the latest 5.0 version using this plugin:
We're creating a new release of our theme, which will resolve the issue. ETA: less than 3 hours.
This is a bug/incompatibility of $theme variable usage in our themes with the latest version of WordPress 5.1