Is it Aware IM installation built using Aware IM Runtime?
It doesn't look like a brand new installation. It looks like Aware IM is trying to load a BSV where one of the standard fields of the RegularUser object has been changed from PlainText to Date or TimeStamp. This is where the error happens - conversion fails.
In a brand new Aware IM installation RegularUser does not have date fields and there is no reason to convert anything as the table is brand new