I had the same problem and for me the following worked:
Reinstalled Anaconda and then I updated the provided JupyterLab version in the (base) terminal. (You would like to update your JupyterLab in the respective virtual environment you are using Anaconda with.)
conda install -c conda-forge jupyterlab==2.2.9
The JupyterLab version in your Anaconda should show 2.2.9 after you restart Anaconda. After this, download node.js and install it on you computer. Then follow the instructions in your Kite desktop app to install the Jupyter Kite extension via the (base) terminal:
pip install jupyter-kite
jupyter labextension install "@kiteco/jupyterlab-kite"
Open your Kite desktop app and click on Redo Setup under the Home section.
In your JupyterLab Kite: Initializing should appear down in the left corner.