To perform the clean as shown in figure
"D:\idea219.3.3\IDEA\IntelliJ IDEA 2019.3.3\jbr\bin\java.exe" -Dmaven.multiModuleProjectDirectory=C:\Users\Administrator\Desktop\ioioio -DarchetypeCatalog=internal -Dmaven.home=D:\JAVAWEB\apache-maven-3.5.2 -Dclassworlds.conf=D:\JAVAWEB\apache-maven-3.5.2\bin\m2.conf "-Dmaven.ext.class.path=D:\idea219.3.3\IDEA\IntelliJ IDEA 2019.3.3\plugins\maven\lib\maven-event-listener.jar" "-javaagent:D:\idea219.3.3\IDEA\IntelliJ IDEA 2019.3.3\lib\idea_rt.jar=63447:D:\idea219.3.3\IDEA\IntelliJ IDEA 2019.3.3\bin" -Dfile.encoding=UTF-8 -classpath D:\JAVAWEB\apache-maven-3.5.2\boot\plexus-classworlds-2.5.2.jar org.codehaus.classworlds.Launcher -Didea.version2019.3.3 -s D:\JAVAWEB\apache-maven-3.5.2\conf\settings.xml -Dmaven.repo.local=D:\JAVAWEB\MavenJar\maven_repository clean
[INFO] Scanning for projects...
Downloading from mirrorId: http://repo1.maven.org/maven2/org/springframework/boot/spring-boot-dependencies/2.3.7.RELEASE/spring-boot-dependencies-2.3.7.RELEASE.pom
[ERROR] [ERROR] Some of the problems were encountered while processing the POMs just:
[ERROR] Non - resolvable import POM: Could not transfer an artifact org. Springframework. The boot: spring - the boot - dependencies: POM: 2.3.7. RELEASE the from/to mirrorId (http://repo1.maven.org/maven2/) : Connect to proxy.host.net: 80/proxy.host.net/127.0.0.1 failed: Connection refused: Connect @ line 39, the column 25
[ERROR] 'dependencies. Dependency. Version for org. Springframework. The boot: spring - the boot - starter: jar is missing. @ line 19, the column 21
[ERROR] 'dependencies. Dependency. Version for org. Springframework. The boot: spring - the boot - starter - test: jar is missing. @ line 24, the column 21
@
[ERROR] The build could not read 1 project - & gt; [1] Help
[ERROR]
[ERROR] The project com. Example: demo: 0.0.1 - The SNAPSHOT (C: \ Users \ \ Administrator \ Desktop \ ioioio \ pom XML) has three errors
[ERROR] Non - resolvable import POM: Could not transfer an artifact org. Springframework. The boot: spring - the boot - dependencies: POM: 2.3.7. RELEASE the from/to mirrorId (http://repo1.maven.org/maven2/) : Connect to proxy.host.net: 80/proxy.host.net/127.0.0.1 failed: Connection refused: Connect @ line 39, the column 25 & gt; [2] Help
[ERROR] 'dependencies. Dependency. Version for org. Springframework. The boot: spring - the boot - starter: jar is missing. @ line 19, the column 21
[ERROR] 'dependencies. Dependency. Version for org. Springframework. The boot: spring - the boot - starter - test: jar is missing. @ line 24, the column 21
[ERROR]
[ERROR] To see the full stack trace of the errors, re - run Maven have the -e switch.
[ERROR] Re - run Maven using the -x switch to enable full debug logging.
[ERROR]
[ERROR] For more information about the errors and possible solutions, both please read the following articles:
[ERROR] [1] Help http://cwiki.apache.org/confluence/display/MAVEN/ProjectBuildingException
[ERROR] [2] Help http://cwiki.apache.org/confluence/display/MAVEN/UnresolvableModelException