We're seeing that JCenter and Gradle repos have dropped a lot of dependencies since yesterday. For some projects this entails that, when you clean your build folders and gradle cache, you won't be able to compile your Java programs, let alone will not have access to certain gradle plugins which originate from https://plugins.gradle.org/m2/ or https://jcenter.bintray.com/com/intershop/gradle/
This sort of situation is why I'm so insistent when it comes to always operating a pull-through cache/mirror for dependencies in the context of a software company. Every company needs to do this to protect themselves against dependencies becoming unavailable or changing unexpectedly.