Troubleshoot installation and login

 | `curl: (22) The requested URL returned error: 403`                                                         | [Install script returned 403](#install-script-returns-html-instead-of-a-shell-script)                                                         |
 | `curl: (23)` or `curl: (56) Failure writing output to destination`                                         | [Check connectivity or use an alternative installer](#curl-56-failure-writing-output-to-destination)                                          |
 | `Killed` during install on Linux, or `Installation was killed before it could finish (exit code 137)`      | [Free memory or add swap space](#install-killed-on-low-memory-linux-servers)                                                                  |
+| `Raw mode is not supported` during install                                                                 | [Rerun the installer](#raw-mode-is-not-supported-during-install)                                                                              |
 | `TLS connect error` or `SSL/TLS secure channel`                                                            | [Update CA certificates](#tls-or-ssl-connection-errors)                                                                                       |
 | `Failed to fetch version` or can't reach download server                                                   | [Check network and proxy settings](#check-network-connectivity)                                                                               |
 | `irm is not recognized` or `&& is not valid`                                                               | [Use the right command for your shell](#wrong-install-command-on-windows)                                                                     |

    ```
 
 2. **Give Docker more memory** if using Docker Desktop. Build containers share the memory allocated to the Docker Desktop virtual machine, so open **Settings > Resources** in Docker Desktop, raise the memory limit, and rerun the build.
+
+### `Raw mode is not supported` during install
+
+When your organization's [server-managed settings](/docs/en/server-managed-settings) include changes that need [security approval](/docs/en/server-managed-settings#security-approval-dialogs), Claude Code versions before 2.1.246 try to show the approval dialog during `claude install`. The dialog needs a terminal on stdin. When the installer runs `claude install` from a pipe, as `curl -fsSL https://claude.ai/install.sh | bash` does, stdin is the pipe rather than a terminal, so the install fails with an error containing `Raw mode is not supported`.
+
+Claude Code v2.1.246 and later don't show the dialog during `claude install` or `claude update`. The command runs with the settings you last approved, and Claude Code shows the dialog in your next interactive session. If your organization's startup configuration [waits for the settings fetch](/docs/en/server-managed-settings#enforce-fail-closed-startup), such as when it sets `forceRemoteSettingsRefresh`, the dialog still appears during these commands, and an install run from a pipe still fails.
+
+In every other configuration, rerunning the installer gets past this error, because the script runs the latest release's `install` command even when you ask it to install an older version. Rerun the command for your platform:
+
+<Tabs>
+  <Tab title="macOS/Linux">
+    ```bash theme={null}
+    curl -fsSL https://claude.ai/install.sh | bash
+    ```
+  </Tab>
+
+  <Tab title="Windows PowerShell">
+    ```powershell theme={null}
+    irm https://claude.ai/install.ps1 | iex
+    ```
+  </Tab>
+</Tabs>
+
+`claude --version` prints the version the rerun installed.
 
 ### `claude update` or `claude doctor` hangs