If you’re unable to log in through JupyterLab but your Anaconda account works in the browser, I’d first make sure you’re running the latest version of Anaconda Toolbox , since there was an update that resolved several Assistant login issues. Also try signing out of the Assistant, restarting JupyterLab, and signing back in. If the problem persists, open your browser’s developer console (or JupyterLab logs) and check for authentication or CORS-related errors, as those can prevent the login flow from completing.