What could cause

Plugin with id 'de.fayard.buildSrcLibs' not found.

if I configured everything like said in the setup page... even though this is a composite gradle build, it USED to work...?

@dave08 Missing

gradlePluginPortal()

repo in buildSrc pluginManagement?

Yup @louiscad, that was it, thanks! But why isn't it mentioned here: https://jmfayard.github.io/refreshVersions/setup/#if-you-have-a-buildsrc-module?

Yep, we should mention the case where people define repositories, which removes the gradlePluginPortal present by default