Sometimes, applications rely on other apps in order to run properly. This means you will need precise versions of dependent apps in order to run the main one and this seems to be the case with E.ON Energy Fit Software.
However, since I can't install the application to test things out, I recommend contacting the developers. You can also report this problem and maybe an update should be deployed.
Use the following page to contact the developers: https://www.eonenergy.com/for-your-home/contact-us