Check that your JDK supports the cipher and it is not disabled. On this page https://docs.oracle.com/javase/8/docs/technotes/guides/security/SunProviders.html#SunJSSEProvider said the following
Cipher suites that use AES_256 require installation of the JCE Unlimited Strength Jurisdiction Policy Files. See Import Limits on Cryptographic Algorithms. https://docs.oracle.com/javase/8/docs/technotes/guides/security/SunProviders.html#importlimits -- You received this message because you are subscribed to the Google Groups "Jenkins Users" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To view this discussion on the web visit https://groups.google.com/d/msgid/jenkinsci-users/48eb396a-27f5-4e85-a1d5-f97813216fd1%40googlegroups.com. For more options, visit https://groups.google.com/d/optout.
