takien on "[Plugin: W3 Total Cache] Problem with Xcache"

Plugin could not be activated because it triggered a fatal error.

Strict Standards: Declaration of W3_Cache_Xcache::delete() should be compatible with W3_Cache_Base::delete($key, $group = '') in /home/u/public_html/wp-content/plugins/w3-total-cache/lib/W3/Cache/Xcache.php on line 15

Fatal error: Call to undefined function xcache_get() in /home/u/public_html/wp-content/plugins/w3-total-cache/lib/W3/Cache/Xcache.php on line 171

please help, thank you.

https://wordpress.org/plugins/w3-total-cache/