Invalid URI: The Authority/Host could not be parsed on iOS. Used to work in 5.6

Hi Everybody.

I get this error, when I run on iOS in latest Unity 2017.
It used to work in Unity 5.6. I build the path on iOS like this:
NSString *fileUri=[NSString stringWithFormat"file:%@?ori=%d&cnt=%d",path,image.imageOrientation,callCount];

Then I attempt to load via WWW class and get the above error?!
I found something on google, where people talk about the file:/ file:// being stricter in Unity 2017, but I can't seem to get it to work.

Anyone have a fix for that?

Thanks in advance

Odin