Hi Oaslan
For installation problems, we really suggest using support tickets. This will help with attaching screenshots & logs (and not make your server's information visible to everyone) and also setup debugging meetings if we need to.
Yes the collation is correct, we can take it out of the suspect list.
For the error that you're having, it would be very helpful to have the installer screenshot and/or the logs (Applicationlog, Scriptlog, Databaselog, Errorlog). They will probably give us better information, or at least help us find at what step the error happens. I think the error you're getting is when a Javascript variable doesn't really exist, it could be for example that it tried to put a Thing in a variable but the Thing doesn't exist, and then try to call a service on that Thing. The logs would probably tell us more.
