Question: Unable to create hosting plan at host level
Such problem normally appears when English language is not the server default language and users are using other regional OS such as Turkish, German, Spanish etc.
Our recommendation & requirement is to install SQL server in "SQL_Latin1_General_CP1_CI_AS" collation. If it is not the above then many of HC’s stored procedures would fail to execute while installing HC. As a result different panel services will be affected such as hosting plan, mail domain creation, disk usage service etc.
Verify the sql collation with the help of the below image:
To revert the existing sql collation follow this article:
OR you may reinstall sql server.