I cannot sign up, only find login in Eduma and Learnpress.

Envato Customers Web and Code
1

YOu have to 24 hours support like Bluehost, your support is not convenient at all.
You have promised 6month support after purchase of Eduma theme.

I bought and imported Demo One instructor and main Demo well already.
However,
I cannot sign up, i find only login.
Which part of customization needed? where can I find to change it.

2

Try to contact the author via item comments section:

3

Try to get in touch with your author. If support is not expired then author is obliged to offer you complete support and service