After applying a new master page and related theme components, we have been receiving reports that users were being presented with 403 ‘forbidden’ errors when trying to load our intranet site. After refreshing the screen four (4) times, the page would finally load. I checked the web server’s Application log and found that every time a user received a 403 error, there was an “Information” Web Event message logged with a source of ASP.NET and an ID of ID 1314. The body of the event included, among other information: Event code: 4011 Event message: An unhandled access exception has occurred. After doing research and knowing this was most likely a…