Problem uploading sb3 files

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Apr 25, 2026, 4:11:25 PMApr 25

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Hi,

I’m having problems uploading .sb3 files that I created myself. When I try to upload them, this message appears:

I had done that before without any problems.

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Apr 25, 2026, 4:12:20 PMApr 25

to Machine Learning for Kids

The error message suggests that it's because the sb3 file contains a reference to a machine learning project that you have since deleted.

But if you'd like to share an example sb3 file, I'd be happy to check it for you.