Decode query string before scanning

redirect/web.config

@@ -5,7 +5,7 @@
             <rules>
                 <rule name="Redirect to localhost" stopProcessing="true">
                     <conditions>
-                        <add input="{QUERY_STRING}" pattern="state=([0-9]+)(,[^,&amp;]*,([^,&amp;]*))?" />
+                        <add input="{UrlDecode:{QUERY_STRING}}" pattern="state=([0-9]+)(,[^,&amp;]*,([^,&amp;]*))?" />
                     </conditions>
                     <action type="Redirect" url="http://127.0.0.1:{C:1}/callback?{UrlDecode:{C:3}}" redirectType="Found" />
                 </rule>