After upgrade to 2.8 POA cannot create IIS hosting on domain. The following error appears in POA log:
Error while executing the query; ERROR: column reference "srv_id" is ambiguous
During upgrade to POA 2.8 the task 'Correct managed handler mappings for all web sites on the host' is scheduled, it breaks the internal static data. This task is scheduled only if IIS 7 exists on POA installation.
Wait until tasks 'Correct managed handler mappings for all web sites on the host' are finished, wait for appropriate moment when other tasks are not running, and restart POA.