I just fixed this issue. Error was occurred due lack of permission and xfs_quota issue.
I remove one of script which was included in DirectAdmin and now I can create domain under reseller account.
If anyone receive similar error then they can debug this by creating a reseller account with unlimited resource and then login to your newly created reseller account and try to create a account. It will show full error like "limited pop account", "quota error", etc.
PreMadeKB's post in Blesta error: (DirectAdmin) - Cannot create user using those settings was marked as the answer