Fatal Error in Plugins

Getting this in wp_debug

[20-Nov-2018 02:00:14 UTC] PHP Fatal error:  Class 'LiteSpeed_Cache_ESI' not found in /home/tovo/public_html/wp-content/plugins/bb-ultimate-addon/modules/modal-popup/modal-popup.php on line 1056
[20-Nov-2018 02:00:14 UTC] PHP Fatal error:  Unknown: Cannot use output buffering in output buffering display handlers in Unknown on line 0
[20-Nov-2018 02:00:14 UTC] PHP Fatal error:  Class 'LiteSpeed_Cache_ESI' not found in /home/tovo/public_html/wp-content/plugins/bb-ultimate-addon/modules/advanced-tabs/advanced-tabs.php on line 237
[20-Nov-2018 02:00:14 UTC] PHP Fatal error:  Unknown: Cannot use output buffering in output buffering display handlers in Unknown on line 0
[20-Nov-2018 02:00:14 UTC] PHP Fatal error:  Class 'LiteSpeed_Cache_ESI' not found in /home/tovo/public_html/wp-content/plugins/bb-ultimate-addon/modules/image-icon/image-icon.php on line 676

BB Ultimate addons is a plugin to complement Beaver Builder.

Environment WP 4.9.8 LSC 2.7

Report number: VXQNTQMM

Report date: 11/20/2018 02:16:25