To correct the error that is not allowed by the 405 method and to keep your brand's trust, we have worked out exactly what it is about and why it is so important. When you try to access a website, your browser sends an HTTP request to the web server to access that website. Unfortunately, the server decides to reject a particular HTTP method, so the web browser cannot access the requested website. The "Not Allowed" error is the HTTP response status code that indicates whether a web server has received or recognized HTTP methods from your web browser. For example, when your website is accessed, the above example sends an HTTP request directly to your web servers requesting access to one of these web pages. The "405 method not allowed" error indicates whether the web server received or recognized the HTTP request or rejected the specific HTTP method requested for that resource. As described in the introduction, the "405 method not allowed" indicates that the Web browser User Agent has requested a valid resource with an invalid HTTP method as valid. Basically, this prevents the browser and its visitors from accessing the WordPress site. The server expects the resource to be requested with the correct method, not with the invalid method . There are 9 possible HTTP methods that can be used, and although some of them are more common than others, they are all valid methods for the same resource. Since each of these possible HTTP methods has its own purpose, it makes sense for the server to accept requests with certain methods for a particular resource. In this scenario, the resource exists because it was created with a new user created when valid credentials were sent via the request's POST HTTP method. The server can respond to a request using the 405 method , and therefore, in this scenario, it makes sense for it to accept receiving requests from the URL of that resource. If the 405 method is not allowed, the best way to find a client error in the response code is to start troubleshooting a potential client - any problems that might cause that error. Errors that are not allowed may be due to the fact that you are trying to execute a particular script, or they may be a side effect of another problem, such as a client-side error. ISP does not allow a particular script to run on its server, and thus returns the status code 405. HTTP methods can be configured on your web server to determine which particular methods may or may not be used. Otherwise, the web servers may not be properly configured to accept the corresponding request methods. If the 405 method is not allowed, an HTTP 501 error with the status code 405 is returned. If the method or methods are not allowed on your site, this error indicates that your web server has been configured to prevent you from performing actions on that particular URI. For example, the static image file of your website will not allow the POST method and will only set the query method to get. To solve this problem, you would need to reinstall any application that tries to use it that has a corresponding module handler definition. Something that changes your IIS settings to include a handler that supports a particular HTTP method. HTTP 405 error is caused when a web server does not allow HTTP methods after requesting the URL. HTTP 405 errors are caused by web servers not allowing HTTP methods after the request of the url. When a 302 status code is received in response to a request other than GET / HEAD, the User Agent redirects the request to confirm it, which may change the conditions under which the requests were made. This condition is seen when a particular handler defines a particular verb and the handler overrides itself to expect the request to be processed. RFC 1945 and RFC 2068 specify that clients must not change the method of redirecting requests. However, most existing user-agent implementations treat a 302 as a 303 response, with the get _ Location field value being executed independently of the original query method. If a request method is received that is not recognized or implemented by the source server, it responds with a 501 status code. Status codes 303 and 307 can be added if the server wants to make clear what kind of response is expected from the client. When the request methods are received, when they are known and not allowed for the target resource, the source server responds with the not-allowed-for-this method. The specification defines GET, HEAD, and POST as cacheable, but the overwhelming majority of cache implementations only support GET / HEAD. Generally, "cacheable" is defined by secure methods that do not depend on the current authoritative response. If the server configuration does not allow certain HTTP request methods to reach a certain url, this means that error messages are not allowed. The server is familiar with HTTP requests, so these methods are "not acceptable" to the target source.