IAB loading on binder get stucked

[fabiodepa]

Describe the environment

First of all I apologize if I am not in the rigth place to pull this request but I did not find any other way to communicate this issue that I have.

I am using Firefox 84.0.1 on macos 11.0.1

What version of IAB are you reading (e.g. v0.0.1)?
This I am not sure how to get it on the stucked binder viewer but it should be the latest

Describe the problem

I keep trying running the IAB online with the binder viewer but I get stuck

Steps to reproduce

1. go to the website http://readiab.org/
2. click on the "Read Latest development" button on the "Read Interactively on Binder (recommended)" section

Observed Results

The log in binder viewer end this way:

Solving environment: ...working... WARNING conda.core.solve:_add_specs(583): pinned spec python=3.7 conflicts with explicit specs.  Overriding pinned spec.
Killed
Removing intermediate container 14c443e18a40
The command '/bin/sh -c conda env update -n base -f environment.yml' returned a non-zero code: 137

Expected Results

The interactive reading way starts

Thanks for any help
Fabio

[fabiodepa]

Edit

I did a try with Safari and it works fast and well.
However, Firefox still has the same problem: slow to strat but it then get stuck but I guess it is a problem of the browser.

Fabio