The about.html files in Eclipse bundles uses http links instead of https or points to / that does not work
Since it's recommended to use https over http, the https://www.eclipse.org/legal/epl/epl-2.0/about.html page should be updated to use https and then the content of that page should be placed in bundles.
Some of the about.html files also contains the block
<a href="/">http://www.eclipse.org</a> and this should obvious be corrected to
<a href="https://www.eclipse.org">https://www.eclipse.org</a> to have the link pointing to what the text states.
An example of the last point above is org.eclipse.nebula.widgets.tablecombo_188.8.131.52111181749.jar in the 2021-12 SimRel release, but there are a lot others.