The newest update v1.0.6 of Sticky Side Buttons contains two errors:
WARNING: in_array() expects parameter 2 to be array, boolean given
wp-content/plugins/sticky-side-buttons/ssb-ui.php 411

WARNING: in_array() expects parameter 2 to be array, boolean given
wp-content/plugins/sticky-side-buttons/ssb-ui.php 371

Reported:
https://wordpress.org/support/topic/error-in-front-end-2/