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I appears there is some issue caused by semantic version numbers with "unique" components. Versions without "unique" resolve just fine.

It appears the resolution doesn't apply url encoding so it considers the

+

in your version string as a url-encoded space, resulting in the following:

<Error>
<Code>NoSuchKey</Code>
<Message>The specified key does not exist.</Message>
<Key>br.dev.pedrolamarao.gradle.metal/plugins/0.1 531d2ecff7/271d2b19289a42d30111209e948de3c889944aba06afe39838971a16fa795252/plugins-0.1 531d2ecff7.pom</Key>
<RequestId>ZAEFEDXW5AJJSTBF</RequestId>
<HostId>csxqHCGFedOK7eqVmxv54v638SzpvdH1wfs4bhzW/NojwmjrEVpzS0+fv9h6be5P/4C2ehsNpyQ=</HostId>
</Error>