The question: Starting a JupyterLab Notebook from the Anaconda Navigator is slow and even buggy at times. But starting JupyterLab from a windows or anaconda command prompt returns Error: Invalid response: 403 Forbidden. Does anyone know what's going on here and what I can do to successfully launch a Notebook in JupyterLab using a command prompt? The details: 1. Launch Jupyterlab from Anaconda prompt: 2. Start a new notebook using New > Notebook 3. Error The result is the same using a windows command prompt. Version info: Windows 7, 64 bit Python 3.7.0 JupyterLab 0.34.9 Continue reading...