Humming Bird Error

Hello I Receive ERROR when trying cache:

Warning: preg_match() expects parameter 2 to be string, array given in /home/****/public_html/wp-content/plugins/wp-hummingbird/core/modules/class-module-caching.php on line 50

Warning: preg_match() expects parameter 2 to be string, array given in /home/****/public_html/wp-content/plugins/wp-hummingbird/core/modules/class-module-caching.php on line 50

Warning: preg_match() expects parameter 2 to be string, array given in /home/****/public_html/wp-content/plugins/wp-hummingbird/core/modules/class-module-caching.php on line 50

Warning: preg_match() expects parameter 2 to be string, array given in /home/****/public_html/wp-content/plugins/wp-hummingbird/core/modules/class-module-caching.php on line 50

Warning: Cannot modify header information - headers already sent by (output started at /home/****/public_html/wp-content/plugins/wp-hummingbird/core/modules/class-module-caching.php:50) in /home/yanis/public_html/wp-includes/pluggable.php on line 1174