Article 6KJC1 Unable to find error in my code.

Unable to find error in my code.

by
ajiten
from LinuxQuestions.org on (#6KJC1)
Though simple, but was interested in the site that states to build up a project in steps.
The very first project is stuck at: https://www.freecodecamp.org/learn/s...cipher/step-17.
The original answer, as well as the modified one, don't help; as shown in the two attachments attached herewith.

The further steps are blocked by the unknown error, so needed help.

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Edit : Sorry, am unable to add images (screenshots), and this is continuing.

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Edit 2: Same error of 'Security token missing', on attempting from smartphone, too.
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