I have got an issue with a cloned project:
Could not transfer artifact org.springframework.boot:spring-boot-maven-plugin:pom:2.1.7.RELEASE from/to central (https://repo.maven.apache.org/maven2): Transfer failed for https://repo.maven.apache.org/maven2/org/springframework/boot/spring-boot-maven-plugin/2.1.7.RELEASE/spring-boot-maven-plugin-2.1.7.RELEASE.pom
This occurred when I tried to clean build my maven project in IntelliJ
Sound like you don't have a proxy in your settings.xml. Take a look here for details on how to set it up.
<proxies>
<proxy>
<id>example-proxy</id>
<active>true</active>
<protocol>http</protocol>
<host>proxy.example.com</host>
<port>8080</port>
<username>proxyuser</username>
<password>somepassword</password>
<nonProxyHosts>www.google.com|*.example.com</nonProxyHosts>
</proxy>
</proxies>
You should be able to take the proxy details from your browser settings.