Pro Sites email confirmation does not contain key activation

I'm having the same issue as https://premium.wpmudev.org/forums/topic/pro-sites-email-confirmation-does-not-contain-key-activation for manual payment.

Provided support access...

Level: 1 - Personal
Period: Every 12 Months
User Email: melfann@singnet.com.sg
Activation Key:
Activation Link: http://www.sauceink.com/activate/?key=
Site Address: http://www.sauceink.com
Manage Site: http://www.sauceink.com/melfann/wp-admin/
Coupon Used:
Payment Amount: 89