feat: add model for syntax error

src/core/protocol/routes/INDEX/IndexRequest.ts

@@ -1,5 +1,5 @@
 /*
- * Copyright (C) 2018 StApps
+ * Copyright (C) 2018-2019 StApps
  * This program is free software: you can redistribute it and/or modify it
  * under the terms of the GNU General Public License as published by the Free
  * Software Foundation, version 3.
@@ -31,6 +31,7 @@ export class SCIndexRoute extends SCAbstractRoute {
     this.errorNames = [
       'SCInternalServerErrorResponse',
       'SCMethodNotAllowedErrorResponse',
+      'SCSyntaxError',
       'SCUnsupportedMediaTypeErrorResponse',
       'SCValidationErrorResponse',
     ];