fixed index description

src/Doc/Business/LuDocBusiness.php

             foreach ($businesses as $business) {
                 $reflection = new ReflectionMethod($business->getBusinessClass(), $business->getBusinessMethod());
                 $description = $reflection->getDocComment();
-                $docParser = new DocBlock($description);
-                $description = $docParser->description;
                 if ($description === false) {
                     $description = "No description available";
                 }
+                else {
+                    $docParser = new DocBlock($description);
+                    $description = $docParser->description;
+                }
                 $business_tiwg["routes"][] = [
                     "method" => $business->getMethod(),
                     "url" => $business->getUrl(),