I created this video to help people install patch update v1.06 for their NBA 2K21.

Why do you need to update to v1.06? 
1. To fix the issue with inivisible rookies.
2. To be able to get future updates without any issues.

FYI
You need to be updated to v1.05 first before updating to v1.06

You need to know your base version before doing any updates
How to know your version? Simple, go to the website where you downloaded your 2k21 it should show what is the version.

For Elamigos version update path should be from base version to v1.03 then v1.05 then v1.06

For CODEX version since its already v1.04 just update to v1.05 
Download Here
once updated to v1.05 you can now use the patch update in this video to v1.06

For FITGIRL version, fitgirl users said they follow the same update path like elamigos and it worked for them

Credits and thanks to author: 3DM

Hope this video will help you. If you have any questions, like and message me here JBOX PH.