diff --git a/build.sh b/build.sh
old mode 100644
new mode 100755
diff --git a/src/useApexREST.js b/src/useApexREST.js
index c36444d..04e31b2 100644
--- a/src/useApexREST.js
+++ b/src/useApexREST.js
@@ -18,14 +18,17 @@
  */
 function useApexREST(config) {
   if (!config.auth || !config.endpoint || !config.payload || typeof config.payload !== 'object') {
-    throw 'useApexREST: invalid configuration object'
+    return {
+      apx_status: 'Error',
+      apx_message: 'useApexREST: invalid configuration object'
+    }
   }
 
   /**
-    * `Script.Util.HttpRequest` returns the response in a .NET (?) CLR format.
-    * This function makes the response usable for JS.
-    * @returns {object | undefined}
-    */
+   * `Script.Util.HttpRequest` returns the response in a .NET (?) CLR format.
+   * This function makes the response usable for JS.
+   * @returns {object | undefined}
+   */
   function processResponse(res) {
     if (!res || !res.content) {
       return undefined
diff --git a/utils_full.js b/utils_full.js
index 0d3dd5c..391ce94 100644
--- a/utils_full.js
+++ b/utils_full.js
@@ -440,14 +440,17 @@ function sfmcUtils() {
    */
   function useApexREST(config) {
     if (!config.auth || !config.endpoint || !config.payload || typeof config.payload !== 'object') {
-      throw 'useApexREST: invalid configuration object'
+      return {
+        apx_status: 'Error',
+        apx_message: 'useApexREST: invalid configuration object'
+      }
     }
 
     /**
-      * `Script.Util.HttpRequest` returns the response in a .NET (?) CLR format.
-      * This function makes the response usable for JS.
-      * @returns {object | undefined}
-      */
+     * `Script.Util.HttpRequest` returns the response in a .NET (?) CLR format.
+     * This function makes the response usable for JS.
+     * @returns {object | undefined}
+     */
     function processResponse(res) {
       if (!res || !res.content) {
         return undefined