I recently had a similar issue.
The root cause of the issue appears to be an un-trusted certificate based on this:
PKIX path building failed: sun.security.provider.certpath.SunCertPathBuilderException: unable to find valid certification path to requested target
Organizations (Companies, Universities, etc) often intercept SSL traffic, decrypt it for inspection and re-encrypt with a private certificate.
To solve this, you will need to obtain the certificate used to resign SSL traffic and add it to the certificate store of the Java JDK that you are using for Mendix as configured in the Studio Pro preferences.
Here is a stackoverflow that explains how to update the java certificate store.
https://stackoverflow.com/a/63722059