Problem with Optional lab in week 2: It does not open

Hello, I pressed the button “Open Lab” for the " Optional lab: Python, NumPy and vectorization". But it does not open - it shows " Preparing your lab…" and stops at 50% and then it shows “we’re having trouble preparing your lab”

There is probably currently an issue with coursera, you should try a few hours after again.

Hi all,

Kindly follow this post for updates regarding this issue.


I couldn’t submit my reply in the post that you mentioned. So these are the details:

  • Name of the specialisation : Machine Learning Specialization
  • Name of course : Supervised Machine Learning: Regression and Classification
  • Week number : 2
  • Optional Lab name : Python, NumPy and vectorization

Yes, the replying feature has been closed for that topic on purpose. The thread has gotten too long.

Keep following it for updates.

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Hi @Sagar_Biswas

Welcome to the community.

I moved your post to the right category in order to mentors be aware of your query and help you.

Please, don’t forgot to post your queries on the right category. It is very important to post on the right space. This is the only way you can have a proper support.

Here you can find our community guidelines.

i hope you understand.

Best regards

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Thank you. The lab is working now.


Okay. Thanks.

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The labs is not working again.

Hi, I have this problem too​:slightly_frowning_face:

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