ModuleNotFoundError: This app has encountered an error

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Hi, When I create new app,I got the following error.

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Thank everyone

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This is my Data sources:

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Please don’t post code or logs as an image in the forum, this is bad practice.
Also, this does not seem to be the full error message.

  • Does the streamlit app work locally?
  • I am surprised that there is no requirements.txt file, it could be that this is why python libraries are missing in the streamlit runtime.
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Oh thank you, my problem is missing request file requirements.txt.

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I just had the same error, except with a different module. Can someone explain the ‘requirements.txt’ file that seems to be needed. What should it contain and where should it be placed?

My app runs locally without any issues. I only encountered this error when deploying.

Thank you!

** EDIT **
I have figured it out through this post.

2 Likes
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@Felix_Pena

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Thank you for the heads up! Not sure what happened, but I rebooted the app and it is back up.

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Thanks a lot

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