我在尝试执行 Mvn Clean Install 时遇到以下错误..这里应该做什么-这会阻止 Pl java 的安装-请协助
[ERROR] Plugin org.apache.maven.plugins:maven-site-plugin:3.9.1 or one of its dependencies could not be resolved: Failed to read artifact descriptor for org.apache.maven.plugins:maven-site-plugin:jar:3.9.1: Could not transfer artifact org.apache.maven.plugins:maven-site-plugin:pom:3.9.1 from/to central (https://repo.maven.apache.org/maven2): Transfer failed for https://repo.maven.apache.org/maven2/org/apache/maven/plugins/maven-site-plugin/3.9.1/maven-site-plugin-3.9.1.pom: Unknown host repo.maven.apache.org: nodename nor servname provided, or not known -> [Help 1]