Update!
The issue lies with the files that gets downloaded.
i downloaded the file from my Studio One 4 page and the issue is gone.
Think you need to look att the file links on the Studio One 5!.
ISSUE WAS.
I did a test installation of Studio one 5 yesterday and i got this error.
Since it was time to clean out my pc i did a full windows reinstallation and formated all my drives today.
after installing and downloadiing all content i wanted and restarted Studio One 5 (Sphere Acount)
the error returned.
i tryed download the file again and its still there, also tried downloading it in my browser and replacing it.
