# Unable to sign in with correct credentials This error appears when the browser's session cookie cannot be set. The most common cause is a misconfigured `DEFGUARD_URL`. ### In version 2.0 `DEFGUARD_URL` is deprecated. The instance URL is now configured through the web UI. Go to **Settings** in the Defguard interface and verify the **Instance URL** field. It must match the URL you are accessing Defguard from, including the correct scheme (`https://` vs `http://`). If the value is wrong, the server will set the session cookie with an incorrect domain or path, causing the browser to reject or discard it. ### HTTP (non-TLS) deployments If you are accessing Defguard over plain `http://` (for example, in a local or development environment), you need to configure auth cookie settings to allow non-secure cookies. See the [Auth cookies configuration](https://docs.defguard.net/2.0/deployment-strategies/configuration#auth-cookies-configuration) documentation for the required settings. --- # Agent Instructions: Querying This Documentation If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question. Perform an HTTP GET request on the current page URL with the `ask` query parameter: ``` GET https://docs.defguard.net/support-1/troubleshooting-guides/core/unable-to-sign-in-with-correct-credentials.md?ask= ``` The question should be specific, self-contained, and written in natural language. The response will contain a direct answer to the question and relevant excerpts and sources from the documentation. Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.