You should check if SysWizard has welcome page before setting focus on Next-Button.

To help you identify the problem I can show you the code. This is the current code from SysWizard class in method prompt:

// Set focus on the Next button only if it is enabled
if(nextButton.enabled())
{
    nextButton.setFocus();
}
formRunInstance.wait();

Change it to this:

// Set focus on the Next button only if it is enabled
if(nextButton.enabled() && this.hasWelcomePage())
{
    nextButton.setFocus();
}
formRunInstance.wait();

This would be a great improvement when we create guides without welcome page.

Best regards

Patrik