Maven could not resolve dependencies, artifacts could not be read - maven-3

Question

I am following a first time tutorial with maven and cannot get past this error. Below is the pom file; link is the error.
pic of error
https://maven.apache.org/xsd/maven-4.0.0.xsd">
4.0.0
<groupId>org.springframework</groupId>
<artifactId>gs-maven</artifactId>
<packaging>jar</packaging>
<version>0.1.0</version>
<properties>
<maven.compiler.source>1.8</maven.compiler.source>
<maven.compiler.target>1.8</maven.compiler.target>
</properties>
<build>
<plugins>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-shade-plugin</artifactId>
<version>2.1</version>
<executions>
<execution>
<phase>package</phase>
<goals>
<goal>shade</goal>
</goals>
<configuration>
<transformers>
<transformer
implementation="org.apache.maven.plugins.shade.resource.ManifestResourceTransformer">
<mainClass>hello.HelloWorld</mainClass>
</transformer>
</transformers>
</configuration>
</execution>
</executions>
</plugin>
</plugins>
</build>

Answer 1

The following stacktrace is printed:
[ERROR] Plugin org.apache.maven.plugins:maven-resources-plugin:2.6 or one of its dependencies could not be resolved: Failed to read artifact descriptor for org.apache.maven.plugins:maven-resources-plugin: jar:2.6: Could not transfer artifact
org.apache.maven.plugins :maven-resources-plugin:pom:2.6 from/to central <https://repo-maven.apache.org/maven2): Connect to repo.maven.apache.org:443 [repo. maven.apache.org/151.101.184.215] failed: Connection timed out: connect -> [Help 1]
[ERROR ]
[ERROR] To see the full stack trace of the errors, re-run Maven with the -e swit
The section Connect to repo.maven.apache.org:443 [repo. maven.apache.org/151.101.184.215] failed: Connection timed out: connect indicates that the connection to repo.maven.apache.org failed.
Are you able to connect to to http://repo.maven.apache.org in your browser? Is there any firewall that could block it?