diff --git a/InvenTree/InvenTree/static/script/inventree/modals.js b/InvenTree/InvenTree/static/script/inventree/modals.js
index 80ada1596f..49de96468f 100644
--- a/InvenTree/InvenTree/static/script/inventree/modals.js
+++ b/InvenTree/InvenTree/static/script/inventree/modals.js
@@ -354,7 +354,7 @@ function renderErrorMessage(xhr) {
     
     var html = '<b>' + xhr.statusText + '</b><br>';
     
-    html += '<b>Status Code - ' + xhr.status + '</b><br><hr>';
+    html += '<b>Error Code - ' + xhr.status + '</b><br><hr>';
     
     html += `
     <div class='panel-group'>
@@ -811,16 +811,37 @@ function launchModalForm(url, options = {}) {
             $(modal).modal('hide');
 
             // Permission denied!
-            if (xhr.status == 403) {
+            if (xhr.status == 400) {
                 showAlertDialog(
-                    "Permission Denied",
+                    "Error 400: Bad Request",
+                    "Server returned error code 400"
+                );
+            } else if (xhr.status == 401) {
+                showAlertDialog(
+                    "Error 401: Not Authenticated",
+                    "Authentication credentials not supplied"
+                );
+            } else if (xhr.status == 403) {
+                showAlertDialog(
+                    "Error 403: Permission Denied",
                     "You do not have the required permissions to access this function"
                 );
-
-                return;
+            } else if (xhr.status == 404) {
+                showAlertDialog(
+                    "Error 404: Resource Not Found",
+                    "The requested resource could not be located on the server"
+                );
+            } else if (xhr.status == 408) {
+                showAlertDialog(
+                    "Error 408: Timeout",
+                    "Connection timeout while requesting data from server"
+                );
+            } else {
+                showAlertDialog('Error requesting form data', renderErrorMessage(xhr));
             }
 
-            showAlertDialog('Error requesting form data', renderErrorMessage(xhr));
+            console.log("Modal form error: " + xhr.status);
+            console.log("Message: " + xhr.responseText);
         }
     };