The service account for this instance of AD LDS cannot be used with the selected configuration set. The account failed validation ...

The service account for this instance of AD LDS cannot be used with the selected configuration set. The account failed validation with the following error:
Error 0x%1!x!
%2

Select a different service account, and then try again. For more information about AD LDS service accounts, see "Selecting a service account" in AD LDS Help.