How do I fix issue with Wp Smush Pro and Media Library

When I updated WP Smush Pro to version 2.6.0.3, the media library won't display images in grid mode, but only as a list. This happens whenever WP Smush Pro is activated. I deactivated all plugins and then activated WP Smush Pro and the problem reoccured. It may be a conflict with the theme, which is zeeTasty. Any suggestions how to deal with this. When I reinstalled version 2.6.0.1 the problem disappeared.