Enable DEBUG logging on the named logger "org.eclipse.jetty.util.ssl.SslContextFactory" and look at the output it produces.
Use the techniques for your configured server logging framework.
It's likely that you have a set of SSL/TLS Protocols and Ciphers that have different Includes/Excludes then you expect.
Compare them with your your working instance.
Keep in mind that Java itself introduces excludes, and Jetty has an include/exclude system as well (note: excludes win over includes in jetty).
The debug output will tell you if a protocol or cipher is excluded, and all of the ways that specific entry was excluded.
Of extra note that the keystore/truststore minimum requirements are constantly evolving on Java and the Web in general.
What you used in the past might not be valid anymore (bitlength too low, use of deprecated certificate signing methods SHA1/MD5, etc)
