In general

"Success as a Service" is a Microsoft .NET solution, which runs without a browser.
The following requirements are necessary:

Windows operating system

Any computer with a standard Microsoft Windows operating system can use the SaaS solution.

Microsoft .NET Framework

The Microsoft .NET Framework is included on every new Windows computer and is used by many solutions as the basis for modern applications. On almost 99% of all computers is this already installed and you have to take any further steps.

Microsoft MSHTML Browser support (GAC)

Some older browsers or operating systems will need to display the Web-browser support for the. NET Framework. This is support for all Microsoft operating systems released as MSHTML. Get after clicking on "register" a mistake with the content "GAC ...", is wanting this support. Download this and just here to install it. Then you start the application by "Login" again..