make filebrowser filelist disappear

[changjiong]

after i installed this github extension，filelists in the filebrowser disappeared。i've googled and tried a lot，but can't fix it ，finally had to reinstall jupyterlab and delete all the node_modules@jupyterlab . it returned to normal, i guess sth is not compatible with filebrowser.

environment: windows 10 python 3.6.8
jupyter core : 4.5.0
jupyter-notebook : 6.0.1
qtconsole : not installed
ipython : 7.8.0
ipykernel : 5.1.2
jupyter client : 5.3.1
jupyter lab : 1.0.2
nbconvert : 5.5.0
ipywidgets : not installed
nbformat : 4.4.0
traitlets : 4.3.2