Build failure

[aneeqahsan01]

I get the following error in Windows WSL while building this:

[ERROR] Failed to execute goal on project rdf2graphml: Could not resolve dependencies for project nl.architolk.rdf2graphml:rdf2graphml:jar:0.0.1-SNAPSHOT: Failed to collect dependencies at net.sf.saxon:saxon:jar:9.1.0.8: Failed to read artifact descriptor for net.sf.saxon:saxon:jar:9.1.0.8: Could not transfer artifact net.sf.saxon:saxon:pom:9.1.0.8 from/to enonic (http://repo.enonic.com/public/): Transfer failed for http://repo.enonic.com/public/net/sf/saxon/saxon/9.1.0.8/saxon-9.1.0.8.pom: PKIX path building failed: sun.security.provider.certpath.SunCertPathBuilderException: unable to find valid certification path to requested target -> [Help 1]

Any solutions?