Some links to OWASP guide pages are broken
Some links to OWASP guides are broken since you get redirected to a different page.
I haven't looked at every link. But here are some examples in the lessons:
https://www.owasp.org/index.php/Top_10_2010-A8-Failure_to_Restrict_URL_Access
https://www.owasp.org/index.php/Top_10_2010-A7-Insecure_Cryptographic_Storage
https://www.owasp.org/index.php/Test_business_logic_data_validation_(OTG-BUSLOGIC-001)