Firefox/Chrome doesn't render markdown cell about jupyterlab-markup HOT 5 CLOSED

mutua@jupyter00:~$ cat /etc/mime.types |grep wasm
application/wasm      wasm
mutua@jupyter00:~$

mutua@jupyter00:~$ python3
Python 3.6.9 (default, Nov  7 2019, 10:44:02)
[GCC 8.3.0] on linux
Type "help", "copyright", "credits" or "license" for more information.
>>> import mimetypes
>>> mimetypes.guess_type('file://home/roberto/testfile.wasm')
('application/wasm', None)
>>>


mutua@jupyter00:~$ echo "application/wasm      wasm" | sudo tee -a /etc/mime.types
application/wasm      wasm
mutua@jupyter00:~$

root@jupyter00:/home/mutua# pip install wasm
Collecting wasm
  Downloading https://files.pythonhosted.org/packages/df/1f/9ef153f0c539e88c569ac489986236db4c4ad9babd81362c892f562d9393/wasm-1.2-py3-none-any.whl
Requirement already satisfied: setuptools in /usr/local/lib/python3.6/dist-packages (from wasm) (44.0.0)
Installing collected packages: wasm
Successfully installed wasm-1.2
root@jupyter00:/home/mutua# jupyter lab inistall @agoose77/jupyterlab-markup
[C 16:23:23.090 LabApp] No such file or directory: /home/mutua/inistall
root@jupyter00:/home/mutua# jupyter lab install @agoose77/jupyterlab-markup
[C 16:23:30.300 LabApp] No such file or directory: /home/mutua/install
root@jupyter00:/home/mutua# jupyter labextension install @agoose77/jupyterlab-markup
Building jupyterlab assets (build:prod:minimize)
root@jupyter00:/home/mutua# pip install wasm
``