Upgrade issue from 9x to 10x

[Galactic_Zero@]

Getting this error when I try to associate a subscription to a hosting plan:

Error: New web server configuration for some domains within the marked subscriptions was not built due to errors in configuration templates. The detailed error message was e-mailed to you, so please check the e-mail, fix the errors, and click here to retry generating configuration.

Emails is not being sent! Have checked spam folders, inboxes etc and no sign of this email and not other log messages being generated. Need help sorting this one out.

Thanks.

 

[Galactic_Zero@]

Centos 5
expected upgrade to go smoothly and no issues.... /sigh