@samuelajayi @wilfredswart you will need to replace the fingerprint sensor flex. Since iFixit does not yet have a guide for that, use something like [https://www.youtube.com/watch?v=qSWz7S3wDxg|this video] to get into the phone. To replace the flex itself you will have to find your own way. The flex itself looks like this
[image|3642471]
and it is readily available.