ACE Service Installer 4.1.0, 4.2.0 and 4.3.0 fail to communicate with charger on old firmware

Overview
We have been informed that ACE Service Installer version 4.1.0, 4.20 and 4.3.0 sometimes is not able to communicate with NG-chargers that still use firmware versions below 5.x
A message like below may appear:

From ACE Service Installer version 4.4.1 and up, it is again possible to these older chargers.

As a back-up option, we made ACE Service Installer version 4.0.0_401 available for download again as well.
We recommend to use the latest version of the ACE Service Installer when you are not impacted as more recent versions bring further improvements.