Can't Login Through OTP After purchased Course

Hye WPLMS, I having this one problem for someone buying directly from my course to use LOGIN OTP

1. Joe is buying directly from my course (course.fairuzrazk.my).

3.  His account automatically created during buying processed. He got email about his account.

1. On the DASHBOARD, he go to EDIT PROFILE and VERIFY his Phone number to enabled for LOGIN OTP.

2. Verified done and successful (He get code from SMS).

3. He logout and want to try the LOGIN OTP.

4. He get SMS Code from his phone and succesfully complete the LOGIN OTP

5. This ERROR pop up ---> https://www.screencast.com/t/o0PVsu9f7

Can you help me on this matter. Thank You UPDATE I found that the Extended Profile for No Phone is Empty --> https://www.screencast.com/t/lH4sMfH4iqG When i updated this field (fill with user no phone), the LOGIN OTP working accordingly. May i know how to automatically update this field (No phone inside extended profile) during user fill in the Checkout form? Thank You