I just disabled the version of Page Builder bundled with the theme and installed/activated the standard version. Doing this enabled your plugin to work as intended and shows the checkboxes inline properly with the labels. The issue appears to be with the way the version bundled with the theme handles checkboxes (overriding to display toggles?).
I poked around in ~/plugins/hide-content-by-role-for-wpbakery/include/admin.php to see how it was registering the roles and applying them to the contend editor, but there doesn’t seem to be anything I can easily modify to make work with the theme’s version. It’s unfortunate because your plugin is exactly what I’m looking for, but since I’m stuck using the theme’s page builder plugin I’m out of luck.
Thank you for helping me look into this, and I do appreciate the time spent troubleshooting on your end. I’m sorry it turned out to be a waste. I’ll try reaching out to the theme’s author to see if there’s anything they can do to improve compatibility.