Match the name

src/class-cf7-extras.php

@@ -67,7 +67,7 @@ public function init() {
 
 		if ( empty( $this->plugin_dir ) ) {
 			$this->set_error(
-				__( 'Failed to load the Contact Form 7 Controls plugin because the plugin directory was not set.', 'contact-form-7-extras' )
+				__( 'Failed to load the Controls for Contact Form 7 plugin because the plugin directory was not set.', 'contact-form-7-extras' )
 			);
 
 			return false;