Terjadi error saat memuat notebook ini. Pastikan file dapat diakses dan coba lagi.

Pastikan Anda memiliki izin untuk melihat notebook ini di GitHub, lalu beri Colab otorisasi untuk menggunakan GitHub API.

https://github.com/flutter/codelabs/blob/master/tfrs-flutter/step1/backend/ranking/ranking.ipynb 
Fetch for https://api.github.com/repos/flutter/codelabs/contents/tfrs-flutter/step1/backend/ranking?per_page=100&ref=master failed: {"message":"No commit found for the ref master","documentation_url":"https://docs.github.com/v3/repos/contents/","status":"404"}
CustomError: Fetch for https://api.github.com/repos/flutter/codelabs/contents/tfrs-flutter/step1/backend/ranking?per_page=100&ref=master failed: {"message":"No commit found for the ref master","documentation_url":"https://docs.github.com/v3/repos/contents/","status":"404"}
    at new QM (https://ssl.gstatic.com/colaboratory-static/common/34e60ea413ae0ca2b8ccf52cad6cb7bc/external_binary_l10n__id.js:2468:68)
    at wa.program_ (https://ssl.gstatic.com/colaboratory-static/common/34e60ea413ae0ca2b8ccf52cad6cb7bc/external_binary_l10n__id.js:2451:436)
    at za (https://ssl.gstatic.com/colaboratory-static/common/34e60ea413ae0ca2b8ccf52cad6cb7bc/external_binary_l10n__id.js:16:57)
    at wa.next_ (https://ssl.gstatic.com/colaboratory-static/common/34e60ea413ae0ca2b8ccf52cad6cb7bc/external_binary_l10n__id.js:14:195)
    at kaa.next (https://ssl.gstatic.com/colaboratory-static/common/34e60ea413ae0ca2b8ccf52cad6cb7bc/external_binary_l10n__id.js:17:48)
    at b (https://ssl.gstatic.com/colaboratory-static/common/34e60ea413ae0ca2b8ccf52cad6cb7bc/external_binary_l10n__id.js:17:309)
 Beri otorisasi dengan GitHub