This happens only on Windows when you have activated Iris mini immediately without restarting your PC.
When Iris mini starts for the first time it will display you window like this.
And you have clicked No. Close Iris mini. Then open it again and click Yes.
Now you will see this
Restart your PC and all values will be enabled. 🙂
If for some reason you get this error, download and install vcredist_x86_2013.
If you get something like “App can’t be opened because it is from an unidentified developer”
See this video