Launcher error

Just installed beakerx in a docker container running ubuntu 18.04. Everything seemed to be working but now I getting the error below. After refreshing the browser a few times it seems to start working again.


The issue does not popup immediately but after loading some data using the SQL kernel the launcher will stop working. Sorry, but I have no idea how to diagnose further.

**Source docker file:**

https://github.com/radiant-rstats/docker/blob/master/rsm-msba-beakerx/Dockerfile

Other files at https://github.com/radiant-rstats/docker/

**Docker hub image:**

https://hub.docker.com/r/vnijs/rsm-msba-beakerx/