first upload all files

app/Exceptions/InvalidLicenseException.php

@@ -0,0 +1,24 @@
+<?php
+
+namespace FleetCart\Exceptions;
+
+use Exception;
+use FleetCart\License;
+
+class InvalidLicenseException extends Exception
+{
+    protected $message;
+
+    public function __construct($message)
+    {
+        $this->message = $message;
+
+        resolve(License::class)->deleteLicenseFile();
+    }
+
+    public function render()
+    {
+        return redirect()->route('license.create')
+            ->with('error', $this->message);
+    }
+}