Extension is not working for JupyterLab version 2.0.0

I have following setup:
`jupyter --version`:
``` jupyter core : 4.6.3
jupyter-notebook : 6.0.3
qtconsole : not installed
ipython : 7.13.0
ipykernel : 5.2.0
jupyter client : 6.1.2
jupyter lab : 2.0.0
nbconvert : 5.6.1
ipywidgets : 7.5.1
nbformat : 5.0.4
traitlets : 4.3.3
```
`conda --version`: `conda 4.8.2`

After installing beakerx using `pip` and `beakerx install`:
`beakerx --version`: `1.4.1`

Till this point everything is working, but when I tried to install lab extension
`jupyter labextension install beakerx-jupyterlab@1.4.1`
it fails to open lab UI with this error:
```
Uncaught TypeError: Cannot read property 'name' of undefined
at JupyterLab.push.2dC9.Application.resolveRequiredService (index.js:191)
at index.js:149
at Array.map ()
at JupyterLab.push.2dC9.Application.activatePlugin (index.js:149)
at index.js:275
at Array.map ()
at JupyterLab.push.2dC9.Application.start (index.js:274)
at main (index.out.js:1107)
```
If we don't install lab extension, lab UI will open but in the notebook we are seeing this error:
`Error displaying widget: model not found`

Is it broken? Or Am I missing something?
Does beakerx not support JupyterLab 2.x yet?