Apache maven is searching in the wrong repository.
But it should point to
If you call https://repo.maven.org/maven2/ with a browser you will be redirected to https://repo1.maven.org/maven2/ .
But other programs can’t follow the redirect.
In my case it was maven itself who wanted to download a plugin.
To fix this issue you have got to patch a dowanloaded jar.
The file you got to fix is called pom-4.0.0.xml.
It’S location $M2_HOME/lib/maven-model-builder-3.0.3.jar:org/apache/maven/model/pom-4.0.0.xml
4.0.0 central Central Repository https://repo.maven.apache.org/maven2 default false central Central Repository https://repo.maven.apache.org/maven2 default false never