while installing Creative cloud InDesign it always gives me the error ex11

Hi all,

I am trying to install the Creative Cloud InDesign. A company gave me access to the software. After downloading the files and trying to extract them it always gives me this Ex11 error.

Somewhere in google I found the message, that this error message appears, when a multiple installation is running. I have shut down my computer and started the whole installation again, but had exactly the same message.

Thanks for an advice!