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Could not fetch resource at https://2.zoppoz.workers.dev/v2/external/notebooks/intro.ipynb?vrz=colab_20250711-060041_RC01_782044654: 400 

Could not fetch resource at https://2.zoppoz.workers.dev/v2/external/notebooks/intro.ipynb?vrz=colab_20250711-060041_RC01_782044654: 400  
FetchError: Could not fetch resource at https://2.zoppoz.workers.dev/v2/external/notebooks/intro.ipynb?vrz=colab_20250711-060041_RC01_782044654: 400  
    at EJ.bE [as constructor] (https://ssl.gstatic.com/colaboratory-static/common/ccf2fd1042ec08c1735590e3895c78f8/external_binary.js:1707:3477)
    at new EJ (https://ssl.gstatic.com/colaboratory-static/common/ccf2fd1042ec08c1735590e3895c78f8/external_binary.js:2341:186)
    at xa.program_ (https://ssl.gstatic.com/colaboratory-static/common/ccf2fd1042ec08c1735590e3895c78f8/external_binary.js:2612:59)
    at za (https://ssl.gstatic.com/colaboratory-static/common/ccf2fd1042ec08c1735590e3895c78f8/external_binary.js:17:57)
    at xa.next_ (https://ssl.gstatic.com/colaboratory-static/common/ccf2fd1042ec08c1735590e3895c78f8/external_binary.js:15:195)
    at kaa.next (https://ssl.gstatic.com/colaboratory-static/common/ccf2fd1042ec08c1735590e3895c78f8/external_binary.js:18:48)
    at b (https://ssl.gstatic.com/colaboratory-static/common/ccf2fd1042ec08c1735590e3895c78f8/external_binary.js:18:309)
 OK