我按照link中给出的步骤连接到Jupyter Notebook的本地实例。我能够在Windows系统中进行连接，但在ubuntu 18.04系统中却无法执行同样的操作。错误消息如下。
Failed to execute cell. Could not send execute message to runtime: SecurityError: The operation is insecure.
详细错误消息为
The operation is insecure.
Cz@https://colab.research.google.com/v2/external/external_polymer_binary.js?vrz=colab-20180906-085300-RC00_211815267:1362:93
Bz.prototype.fetch/<@https://colab.research.google.com/v2/external/external_polymer_binary.js?vrz=colab-20180906-085300-RC00_211815267:1361:114
za@https://colab.research.google.com/v2/external/external_polymer_binary.js?vrz=colab-20180906-085300-RC00_211815267:528:334
xa.prototype.next_@https://colab.research.google.com/v2/external/external_polymer_binary.js?vrz=colab-20180906-085300-RC00_211815267:526:387
Ca/this.next@https://colab.research.google.com/v2/external/external_polymer_binary.js?vrz=colab-20180906-085300-RC00_211815267:529:204
Ea/<@https://colab.research.google.com/v2/external/external_polymer_binary.js?vrz=colab-20180906-085300-RC00_211815267:530:83
Ea@https://colab.research.google.com/v2/external/external_polymer_binary.js?vrz=colab-20180906-085300-RC00_211815267:529:505
w@https://colab.research.google.com/v2/external/external_polymer_binary.js?vrz=colab-20180906-085300-RC00_211815267:530:117
Bz.prototype.fetch@https://colab.research.google.com/v2/external/external_polymer_binary.js?vrz=colab-20180906-085300-RC00_211815267:1361:60
Bz.prototype.get/<@https://colab.research.google.com/v2/external/external_polymer_binary.js?vrz=colab-20180906-085300-RC00_211815267:1360:95
za@https://colab.research.google.com/v2/external/external_polymer_binary.js?vrz=colab-20180906-085300-RC00_211815267:528:334
xa.prototype.next_@https://colab.research.google.com/v2/external/external_polymer_binary.js?vrz=colab-20180906-085300-RC00_211815267:526:387
Ca/this.next@https://colab.research.google.com/v2/external/external_polymer_binary.js?vrz=colab-20180906-085300-RC00_211815267:529:204
Ea/<@https://colab.research.google.com/v2/external/external_polymer_binary.js?vrz=colab-20180906-085300-RC00_211815267:530:83
Ea@https://colab.research.google.com/v2/external/external_polymer_binary.js?vrz=colab-20180906-085300-RC00_211815267:529:505
w@https://colab.research.google.com/v2/external/external_polymer_binary.js?vrz=colab-20180906-085300-RC00_211815267:530:117
Bz.prototype.get@https://colab.research.google.com/v2/external/external_polymer_binary.js?vrz=colab-20180906-085300-RC00_211815267:1360:50
h.getKernelSpecs/<@https://colab.research.google.com/v2/external/external_polymer_binary.js?vrz=colab-20180906-085300-RC00_211815267:2757:94
za@https://colab.research.google.com/v2/external/external_polymer_binary.js?vrz=colab-20180906-085300-RC00_211815267:528:334
xa.prototype.next_@https://colab.research.google.com/v2/external/external_polymer_binary.js?vrz=colab-20180906-085300-RC00_211815267:526:387
Ca/this.next@https://colab.research.google.com/v2/external/external_polymer_binary.js?vrz=colab-20180906-085300-RC00_211815267:529:204
Ea/<@https://colab.research.google.com/v2/external/external_polymer_binary.js?vrz=colab-20180906-085300-RC00_211815267:530:83
Ea@https://colab.research.google.com/v2/external/external_polymer_binary.js?vrz=colab-20180906-085300-RC00_211815267:529:505
w@https://colab.research.google.com/v2/external/external_polymer_binary.js?vrz=colab-20180906-085300-RC00_211815267:530:117
h.getKernelSpecs@https://colab.research.google.com/v2/external/external_polymer_binary.js?vrz=colab-20180906-085300-RC00_211815267:2757:49
b1/<@https://colab.research.google.com/v2/external/external_polymer_binary.js?vrz=colab-20180906-085300-RC00_211815267:2795:163
za@https://colab.research.google.com/v2/external/external_polymer_binary.js?vrz=colab-20180906-085300-RC00_211815267:528:334
xa.prototype.next_@https://colab.research.google.com/v2/external/external_polymer_binary.js?vrz=colab-20180906-085300-RC00_211815267:526:387
Ca/this.next@https://colab.research.google.com/v2/external/external_polymer_binary.js?vrz=colab-20180906-085300-RC00_211815267:529:204
Ea/<@https://colab.research.google.com/v2/external/external_polymer_binary.js?vrz=colab-20180906-085300-RC00_211815267:530:83
Ea@https://colab.research.google.com/v2/external/external_polymer_binary.js?vrz=colab-20180906-085300-RC00_211815267:529:505
w@https://colab.research.google.com/v2/external/external_polymer_binary.js?vrz=colab-20180906-085300-RC00_211815267:530:117
b1@https://colab.research.google.com/v2/external/external_polymer_binary.js?vrz=colab-20180906-085300-RC00_211815267:2794:279
n3@https://colab.research.google.com/v2/external/external_polymer_binary.js?vrz=colab-20180906-085300-RC00_211815267:2906:414
ZY.prototype.connect@https://colab.research.google.com/v2/external/external_polymer_binary.js?vrz=colab-20180906-085300-RC00_211815267:2910:357
p3/<@https://colab.research.google.com/v2/external/external_polymer_binary.js?vrz=colab-20180906-085300-RC00_211815267:2908:365
za@https://colab.research.google.com/v2/external/external_polymer_binary.js?vrz=colab-20180906-085300-RC00_211815267:528:334
xa.prototype.next_@https://colab.research.google.com/v2/external/external_polymer_binary.js?vrz=colab-20180906-085300-RC00_211815267:526:387
Ca/this.next@https://colab.research.google.com/v2/external/external_polymer_binary.js?vrz=colab-20180906-085300-RC00_211815267:529:204
Ea/<@https://colab.research.google.com/v2/external/external_polymer_binary.js?vrz=colab-20180906-085300-RC00_211815267:530:83
Ea@https://colab.research.google.com/v2/external/external_polymer_binary.js?vrz=colab-20180906-085300-RC00_211815267:529:505
w@https://colab.research.google.com/v2/external/external_polymer_binary.js?vrz=colab-20180906-085300-RC00_211815267:530:117
p3@https://colab.research.google.com/v2/external/external_polymer_binary.js?vrz=colab-20180906-085300-RC00_211815267:2908:171
MP/<@https://colab.research.google.com/v2/external/external_polymer_binary.js?vrz=colab-20180906-085300-RC00_211815267:2928:180
答案 0 :(得分：0)
使用Mozilla Firefox时是否遇到此错误？如果是这样，您可能需要设置network.websocket.allowInsecureFromHTTPS首选项。有关更多详细信息，请参见本地运行时文档的“特定于浏览器的设置”：https://research.google.com/colaboratory/local-runtimes.html。
注意：您需要在每个系统上配置此设置。
如果这不能解决问题，您是否可以发布更多详细信息，包括：