Poppy ergo JR- terminal on poppy.local refused to connect

Hello everyone

I installed poppy ergo jr on RPI3 on Buster, in poppy manager http: //poppy.local/jupyter is refused to connect , snap not working also
Every help is welcome.

installed from github.com/ipython-contrib/IPython-notebook-extensions/archive/master.zip

libxml2-dev is already the newest version (2.9.4+dfsg1-7+b3).
libxml2-dev set to manually installed.
libxslt1-dev is already the newest version (1.1.32-2.1~deb10u1)
Note, selecting ‘libxslt1-dev’ instead of ‘libxslt-dev’
libxml2-dev is already the newest version (2.9.4+dfsg1-7+b3).
libxml2-dev set to manually installed.
libxslt1-dev is already the newest version (1.1.32-2.1~deb10u1).

best regards,