I invited a friend to use Qoder, my friend has already done the following steps, but he still doesn’t get the free Pro Trial successfully? Is there any way to help resolve this?
How can my friend get the Pro Trial?
To automatically receive the free Pro Trial, your friend must meet the following requirements:
Hello, can you send your friend’s registered account email so we can check it 
here is the email 43386166@qq.com
Hello, we’ve checked and found that the current device already has a trial account.
Hello, could you also help me check this invited account? After registration, no Pro trial was provided, and there are no Credits in the account。1827510569@qq.com，谢谢。
His computer device has already been used by another account
Does it mean that a computer can only log in to one account at most？
If he logs into this account using a computer that has never logged into Qoder before, will he still be granted a Pro trial period? Will the person who invited him still receive an invitation reward。
Please help me answer these questions。