404 Error for Public Notebook

[quantum-kittens]

Describe the bug
When trying to render this notebook
The following error is obtained:
404 : Not Found
Remote HTTP 404: Qiskit_Reference_Guides/Playing_with_Quantum_Circuits_in_Qiskit.ipynb not found among 11 files

To Reproduce
Steps to reproduce the behavior:

1. Go to https://nbviewer.jupyter.org/
2. Enter Jupyter Notebook location https://github.com/quantum-kittens/quantum-computing-basics/blob/master/Qiskit_Reference_Guides/Playing_with_Quantum_Circuits_in_Qiskit.ipynb
3. Click Go!
4. See error

Expected behavior
A clear rendering of the notebook. It has a sister notebook in the same folder that was successfully rendered: https://nbviewer.jupyter.org/github/quantum-kittens/quantum-computing-basics/blob/master/Qiskit_Reference_Guides/Playing_with_Quantum_States_in_Qiskit.ipynb

Thank you!

[joao-aguilera-c]

Hey! I see your notebook is corrected displayed now on nbviewer!

Do you recall how much time it took to work? I'm experiencing the same issue here on

https://nbviewer.jupyter.org/github/joao-aguilera-c/CVM-FUNDS-DATA-EXTRACTOR/blob/main/ETL%20de%20dados%20de%20Fundos%20de%20Investimentos%20Brasileiros.ipynb

[HDembinski]

I get the same error with
https://nbviewer.jupyter.org/github/HDembinski/essays/blob/master/Uncertainty%20of%20efficiency%20computed%20from%20fitted%20yields.ipynb

which should render this notebook
https://github.com/HDembinski/essays/blob/master/Uncertainty%20of%20efficiency%20computed%20from%20fitted%20yields.ipynb

Initially, I assumed it is because of the spaces in the URL, but other URLs with spaces work fine.

[joao-aguilera-c]

It is happening again. In both cases it was when I changed the file. After one day or two it gets normal. But this sucks...

https://github.com/joao-aguilera-c/ANALISE-FUNDOS-DE-INVESTIMENTOS/blob/main/Analise%20Exploratoria%20dos%20Dados%20%20A%20industria%20dos%20FI%20Brasileiros.ipynb

this is the notebook nb is not rendering..

[hodgestar]

https://nbviewer.org/github/qutip/qutip-notebooks/blob/master/examples/single-photon-interference-example.ipynb is also not rendering. :/