I get a error when I use maven to build my project.so please help! thank you for your help
Failed to execute goal org.apache.maven.plugins:maven-ass
Check your Maven version. I had the same problem and nothing worked until I downloaded and installed a later version of Maven (from 3.2 to 3.6). This solved the issue for me. Also I was using Java 11 and from what I see here: https://mkyong.com/maven/how-to-install-maven-in-windows/
Maven 3.3+ requires JDK 1.7+
Maven 3.2 requires JDK 1.6+
Maven 3.0/3.1 requires JDK 1.5+