Several Critical Errors (included in message)

Warning: require_once(/var/web/site/public_html/wp-content/plugins/ai-engine/constants/init.php): Failed to open stream: No such file or directory in /var/web/site/public_html/wp-content/plugins/ai-engine/classes/core.php on line 4 Fatal error: Uncaught Error: Failed opening required ‘/var/web/site/public_html/wp-content/plugins/ai-engine/constants/init.php’ (include_path=’.:/usr/share/php’) in /var/web/site/public_html/wp-content/plugins/ai-engine/classes/core.php:4 Stack trace: #0 /var/web/site/public_html/wp-content/plugins/ai-engine/classes/init.php(37): require() #1 /var/web/site/public_html/wp-content/plugins/ai-engine/classes/init.php(45): {closure}(‘Meow_MWAI_Core’) #2 /var/web/site/public_html/wp-content/plugins/ai-engine/ai-engine.php(23): require_once(‘/var/web/site/p…’) #3 /var/web/site/public_html/wp-settings.php(447): include_once(‘/var/web/site/p…’) #4 /var/web/site/public_html/wp-config.php(96): require_once(‘/var/web/site/p…’) #5 /var/web/site/public_html/wp-load.php(50): require_once(‘/var/web/site/p…’) #6 /var/web/site/public_html/wp-signup.php(4): require(‘/var/web/site/p…’) #7 {main} thrown in /var/web/site/public_html/wp-content/plugins/ai-engine/classes/core.php on line 4 Notice: Function is_embed was called incorrectly. Conditional query tags do not work before the query is run. Before then, they always return false. Please see Debugging in WordPress for more information. (This message was added in version 3.1.0.) in /var/web/site/public_html/wp-includes/functions.php on line 5835