Errors executing Maven (MacOs Catalina) : Unresolveable build extension / Python configuration for SNAP (ESA)

Question

I try to configure Python for SNAP software. As it is recommanded in this forum (https://forum.step.esa.int/t/unable-to-install-snappy-jpy-problem/5372/28) I have installed maven and followed the steps :

brew install maven
cd jpy
python setup.py bdist_wheel

I get the following errors :

installing to build/bdist.macosx-10.9-x86_64/wheel running install running maven Executing Maven goal 'package' [INFO] Scanning for projects... Downloading from central: https://repo.maven.apache.org/maven2/org/apache/maven/wagon/wagon-ssh/1.0-beta-7/wagon-ssh-1.0-beta-7.pom [ERROR] [ERROR] Some problems were encountered while processing the POMs: [ERROR] Unresolveable build extension: Plugin org.apache.maven.wagon:wagon-ssh:1.0-beta-7 or one of its dependencies could not be resolved: Failed to read artifact descriptor for org.apache.maven.wagon:wagon-ssh:jar:1.0-beta-7 @ @ [ERROR] The build could not read 1 project -> [Help 1] [ERROR]
[ERROR] The project org.jpy:jpy:0.10.0-SNAPSHOT (/Users/laura/jpy/pom.xml) has 1 error [ERROR] Unresolveable build extension: Plugin org.apache.maven.wagon:wagon-ssh:1.0-beta-7 or one of its dependencies could not be resolved: Failed to read artifact descriptor for org.apache.maven.wagon:wagon-ssh:jar:1.0-beta-7: Could not transfer artifact org.apache.maven.wagon:wagon-ssh:pom:1.0-beta-7 from/to central (https://repo.maven.apache.org/maven2): transfer failed for https://repo.maven.apache.org/maven2/org/apache/maven/wagon/wagon-ssh/1.0-beta-7/wagon-ssh-1.0-beta-7.pom: sun.security.validator.ValidatorException: PKIX path building failed: sun.security.provider.certpath.SunCertPathBuilderException: unable to find valid certification path to requested target -> [Help 2] [ERROR] [ERROR] To see the full stack trace of the errors, re-run Maven with 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, please read the following articles: [ERROR] [Help 1] http://cwiki.apache.org/confluence/display/MAVEN/ProjectBuildingException [ERROR] [Help 2] http://cwiki.apache.org/confluence/display/MAVEN/PluginManagerException

Many topics raising a similar issue are solved by reconfiguring proxy or firewall. As I work on my own computer (macOS Catalina 10.15.7), without proxy or firewall, and as I don't have any knowledge of how it works, all help is welcome !

Thanks in advance,