The domain you attempted to add contains a not allowed word or phrase. You were warned prior to being blocked. Please wait 24 hours and you will be able login again.
You are supposed to post at https://community.x10hosting.com/threads/multi-account-unblock-requests.209963/ that is the only place it can be addressed.
From the error message:
Invalid Email Verification
The link used to reset the email address linked to an acccount was expired or invalid. Links are only valid for 2 hours after the email is sent. Please wait 24 hours and attempt to verify the email again.
A failed IMAP access would be because of incorrect username and/or password. You would have to correct the username and password you’re using to access IMAP email on your local machine to prevent it from happening in the future.
Your post is in the wrong place. This is only for multi-account suspensions. You would need to post your unsuspension request at https://community.x10hosting.com/forums/unsuspension-requests.147/
If using Wordpress, here is a helpful guide https://wordpress.com/go/tutorials/migrate-wordpress-website/.
Then also changing the nameservers to ns1.x10hosting.com and ns2.x10hosting.com
That Softaculous article talks about existing sites, as that is the only way to do it, you would need to have an installation first before you can create a staging