sbt.librarymanagement.ResolveException: Error downloading in sbt project with sbt plugin module - scala

Question

I'm having the following problem. I have a multimodule project described in the following way.
import Build._
import sbt.Keys.scalacOptions
lazy val moduleA =
module(id = "module-a", "module-a")
lazy val moduleB =
module(id = "module-b", "module-b")
lazy val root =
module(id = "sample-project", directory = ".")
.aggregate(moduleA, moduleB)
lazy val plugin = Project(id = "plugin", base = file("plugin"))
.settings(
sbtPlugin := true,
name := "MyPlugin"
)
.dependsOn(moduleA)
Where Build declares the following helpers
object Build {
val scala212 = "2.12.11"
val scala213 = "2.13.3"
val projectScalaVersion = scala213
val supportedScalaVersions = List(scala213, scala212)
val projectVersion = "0.3.5-SNAPSHOT"
val projectOrganization = "com.example"
val commonSettings = Seq(
version := projectVersion,
crossScalaVersions := supportedScalaVersions,
organization := projectOrganization,
scalaVersion := projectScalaVersion,
scalacOptions += "-deprecation",
scalafmtOnCompile := true
)
def module(id: String, directory: String): Project = {
Project(id = id, base = file(directory))
.settings(commonSettings: _*)
}
implicit class ProjectOps(project: Project) {
def libraries(modules: ModuleID*): Project = {
project.settings(libraryDependencies ++= modules)
}
def disablePublish: Project = {
project.settings(publishLocal := {}, publishM2 := {}, publish := {})
}
}
}
I'm trying to add an sbt plugin to expose some of the parts of the project using tasks.
Unfortunately when compiling the plugin I get the following error:
sbt:sample-project> plugin/compile
[info] Updating
[info] Resolved dependencies
[warn]
[warn] Note: Unresolved dependencies path:
[error] stack trace is suppressed; run last plugin / update for the full output
[error] (plugin / update) sbt.librarymanagement.ResolveException: Error downloading com.example:module-a_2.12:0.3.5-SNAPSHOT
[error] Not found
[error] Not found
[error] not found: https://repo1.maven.org/maven2/com/example/module-a_2.12/0.3.5-SNAPSHOT/module-a_2.12-0.3.5-SNAPSHOT.pom
[error] not found: /Users/ltrojanowski/.ivy2/local/com.example/module-a_2.12/0.3.5-SNAPSHOT/ivys/ivy.xml
[error] not found: https://repo.scala-sbt.org/scalasbt/sbt-plugin-releases/com.example/module-a_2.12/0.3.5-SNAPSHOT/ivys/ivy.xml
[error] not found: https://repo.typesafe.com/typesafe/ivy-releases/com.example/module-a_2.12/0.3.5-SNAPSHOT/ivys/ivy.xml
[error] Total time: 3 s, completed Aug 26, 2020 1:35:20 PM
I don't know why this is happening. Any help or tip in how to fix this would be much appreciated.