Unable to load css files

[cedavidyang]

Custom styles defined in rise.css or <filename>.css is not loaded. The files are placed in the same folder as the <filename>.ipynb file. Jupyterlab was opened from the parent folder of <filename>.ipynb. The following 403 warning is the terminal output:
403 GET /files//rise.css (::1): /rise.css is not in root static directory

• Python version: 3.11.5
• Jupyterlab version: 4.2.5
• Extension version: jupyerlab_rise 0.42.0

[afeld]

Possible duplicate of #27.