This plugin is breaking Advanced Custom Fields submenu and replaces the ACF url to "Column view". ACF is amost a "core" plugin and many of us cant live without it.
This is the first time this kind of "bug" occurs for me in many years if implementing plugins. ACF has one of the most stable sourcecode.
Running for this install, also WPML, Buddypress, Woocommerce in a single WP latest. Around 80 plugins active.
There must be a variable conflict.