nbgitpuller chrome extension not working when pulling branches other than main

[balajialg]

@rohanjha reported this issue in nbgitpuller repository - jupyterhub/nbgitpuller#289

The nbgitpuller doesn't generate the right link when pulling branches other than main. When I tried pulling this file to data100.datahub.berkeley.edu using the chrome extension, the load failed. However, when I manually input all the info here and tried again, the pull succeeded, causing me to believe it's an issue with the chrome extension. A photo of the manual input can be seen below.
Screen Shot 2023-01-29 at 11 21 46 AM
Expected behaviour

The link loads properly
Actual behaviour

The chrome extension file redirect doesn't load properly. Instead, the following error message pops up
Screen Shot 2023-01-29 at 11 16 27 AM
How to reproduce

Use the chrome extension to generate a nbgitpuller link for this file
Your personal set up

OS:
macOS 11.3.1
Version(s):
nbgitpuller 1.1.0, jupyterhub 3.1.0, notebook==6.4.12, jupyterlab==3.4.5, python==3.9

Full environment
Configuration
Logs