Error notice

I’m getting this message on the Edit Role and Add New Role screens of the Members (by MemberPress) plugin:

Notice: Trying to get property ‘post_type’ of non-object in /var/www/wp-content/plugins/content-aware-sidebars/lib/wp-content-aware-engine/core.php on line 682

I’m using the following perhaps relevant plug-ins: Content Aware Sidebars, Advanced Custom Fields Pro, Polylang Pro, ACF Options for Polylang.

I’m experiencing a bunch of glitchy issues previewing custom post type with a custom author role for that post type, but don’t know if they’re related to this issue.