Eclipse plugin isn't installable

[byteit101]

This repository suggests http://takari.io/book/40-lifecycle.html which suggests http://repository.takari.io:8081/nexus/content/sites/m2e.extras/takari-team/0.1.0/N/LATEST/ which doesn't load for me.

Alternatively, discovering m2e connectors fails with

Problems occurred while performing installation: Error(s) occurred gathering items for installation
Error(s) occurred gathering items for installation
Error installing Takari Lifecycle Support unable to locate installable unit io.takari.stats.m2e.feature.feature.group
Error installing Takari Lifecycle Support unable to locate installable unit org.eclipse.m2e.logback.feature.feature.group
Error installing Takari Lifecycle Support unable to locate installable unit org.eclipse.m2e.feature.feature.group