HTTP 403 is a status code. Generally, you see this message on your screen when you try to access a web address that is forbidden.
Error 403 forbidden occurs for different reasons. Sometimes it can be a result of the changes your web hosting provider recently made in the system. While in some other cases this error can be caused by some latest updates. No matter what the cause is, you cannot start troubleshooting before finding out the problem causing factor first. This helps you to fix the error very easily and as quickly as possible.