Link-Unsubscribe is not working!

Dear Community,
I hope you're doing well.
I am currently facing an issue with the One-Click Unsubscribe URL implementation in Adobe Journey Optimizer. Despite following the standard setup steps, the unsubscribe link does not appear to be functioning as expected.
Could you please assist me in identifying the cause and guide me on how to resolve this issue?
Any insights or recommendations would be greatly appreciated.
Thank you in advance for your support.
Best regards,
Karthikeyan Sakthivel
