jedo19
I'm guessing it is erroring when it sees the toemsadmin account and one of your policies is certainly that password can not have username within. Plus the 14 character requirement mentioned above.
Could you apply a local policy to just that server to change the rule to something more simple? I know, security, but it might be a way around the issue. Not going to say that I fully remember all the parts of the password GPO, might require moving that server to another container, GPO overrides local. You'd need to apply a less secure policy to that new container for things to work.
Maybe in the next version the installer could be changed to allow user input for the default account, or maybe not even have a default account and make it all user input. I have no idea how much work this would take.