JupyterLab Terminal Error

[martineastwood]

Describe the bug:
Jupyterlab terminal fails to open from Launcher screen with error message i is not a constructor. Also, trying to start a terminal in Jupyterlab by selecting file->new->terminal fails to open a new terminal tab

Expected behaviour:
A new terminal tab should be opened in Jupyterlab

Steps to reproduce the issue:

1. Run docker run -p 8080:8080 mltooling/ml-workspace:latest
2. Navigate to http://localhost:8080
3. Select Open Tool, Jupyterlab
4. From Jupyterlab's Lancher screen click on Terminal icon

Technical details:

• Workspace version : 0.8.4
• Docker version :
  Client: Docker Engine Community:
  Version: 18.09.2
  API version: 1.39
  Go version: go1.10.8
  Git commit: 6247962
  Built: Sun Feb 10 04:12:39 2019
  OS/Arch: darwin/amd64
  Experimental: false

Server Docker Engine Community:
Engine:
Version: 18.09.2
API version: 1.39 (minimum version 1.12)
Go version: go1.10.6
Git commit: 6247962
Built: Sun Feb 10 04:13:06 2019
OS/Arch: linux/amd64
Experimental: true

• Host Machine OS (Windows/Linux/Mac): MacOS Mojave 10.14.6
• Command used to start the workspace : docker run -p 8080:8080 mltooling/ml-workspace:latest
• Browser (Chrome/Firefox/Safari): Chrome 75.0.3770.142 (Official Build) (64-bit)

Possible Fix:

Additional context:
Using Safari as browser gives the error message undefined is not a constructor (evaluating 'new i(s,n)')

[lukasmasuch]

Thanks @martineastwood for reporting this issue! I was also able to reproduce the error. It seems like a bug with Jupyterlab version 1.1.3. I will fix it in the next workspace version by updating Jupyterlab to 1.1.4.

As a quickfix, you can just update jupyterlab within the running workspace (using the Jupyter terminal):

conda install -y -c conda-forge jupyterlab=1.1.4

[martineastwood]

Thanks @lukasmasuch, I can confirm the quickfix above works. Looking forward to the next version with the fix :)

[lukasmasuch]

I just uploaded a new Workspace version (0.8.5) to Dockerhub which contains a fix for the terminal problem with JupyterLab. While upgrading JupyterLab makes the terminal functional again, the actual problem was with some incompatible JupyterLab extensions. You can try it out via:

docker run -p 8080:8080 mltooling/ml-workspace:0.8.5

[nrasadi]

I have the same problem with JupyterLab version 3.1.10 on Ubuntu 17.10.
The error's title is Launcher Error, and the message is Unhandled error.