Pls I need help on personal library project, all the 10 functional tests passing but tests 2, 5, 6

Tell us what’s happening:
Describe your issue in detail here.
I have not been able to pass tests 2, 5 and 6 when I submit the link, and yet the my code seems to function accordingly

Your project link(s)

solution: https://replit.com/@ayobamimichael/boilerplate-project-library

Blockquote
boilerplate-project-library - Replit

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User Agent is: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/100.0.4896.88 Safari/537.36

Challenge: Personal Library

Link to the challenge: