These are all really old and outdated web browsers that don't support either the canvas or the svg tags that RGraph uses to create the charts. RGraph used to work with something called ExCanvas (for IE7 and IE8 support) but as time went on and demands grew, the minimum browser requirement was upped to IE9.
In April 2021 version 6.00 of RGraph was released. This version did not contain a massive amount of changes and nor did it break compatibility - but what made it a major version update was the change to start incorporating javascript es6 features.
So you will need a modern(ish) browser to use RGraph. When this version of RGraph was released es6 had been around for over 5 years - so it was a good time to start using it!
If you want the last 5.xx version of RGraph, that is compatible with older browsers, you can get it from the download page.