Export Mule Project - Cannot invoke org.eclipse.aether.RepositorySystem.newLocalRepositoryManager

When I do the export of a project this error happens:

Cannot invoke "org.eclipse.aether.RepositorySystem.newLocalRepositoryManager(org.eclipse.aether.RepositorySystemSession, org.eclipse.aether.repository.LocalRepository)" because "repositorySystem" is null 

I'm using:

• Anypoint Studio 7.19
• Mule Runtime 4.6.9
• MMP (Mule Maven Plugin) 3.2.0

I need to succeed at exporting a simple project (proxy) using the latest LTS Runtime 4.6.9

You are using a very old version of the Mule Maven Plugin. Version 3.2.0 was released in 2018. That version is not compatible with Mule 4.5 o newer, as the Mule Maven Plugin 3.2.0 release notes say. Use the latest release available.