NiFi UI error "Host does not match SNI"

[#1]

This is a known issue https://issues.apache.org/jira/browse/NIFI-3800 which is fixed in Apache NiFi 1.2.0 (HDF 2.1.4 and later)

Workaround: You can downgrade your Java version to openjdk-1.8.0_121 if you are using something higher than that.