We are aware of an issue after updating to cPanel versions 11.110.0.65, 11.126.0.21, or 11.128.0.11, some cPanel plugins or features are no longer functioning properly including WP Toolkit. Presently, updates for releases are temporarily disabled while we continue working on a solution for the missing addon features directory. Please see the following article for more information and updates:
Update to latest cPanel 110, 126, or 128 versions removes "addonfeatures" directory.