Hi all, I had a working version of Nifi 1.7.1 installed on my personal laptop, and was using it for developing flows on localhost:8080/nifi I'm not sure if it's because I upgraded my Mac OS to OS Mojave, or not, but I can no longer access the UI. I see this issue has popped up before, but can't seem to resolve my issue. Things I've already done: 1. updated the nifi.security.properties.key to have a value instead of being blank. 2. checked the logs. I AM seeing an error, but I'm not able to figure out what to do to solve. I'm copy/pasting the WARN and ERROR logs below: WARN: 2018-11-14 05:15:08,167 WARN [main] o.e.j.webapp.StandardDescriptorProcessor Duplicate mapping from / to default 2018-11-14 05:15:08,236 WARN [main] org.apache.nifi.web.server.JettyServer Failed to start web server... shutting down. 2018-11-14 05:36:40,501 WARN [main] o.e.j.webapp.StandardDescriptorProcessor Duplicate mapping from / to default 2018-11-14 05:36:40,568 WARN [main] org.apache.nifi.web.server.JettyServer Failed to start web server... shutting down. 2018-11-14 05:55:57,154 WARN [main] o.e.j.webapp.StandardDescriptorProcessor Duplicate mapping from / to default 2018-11-14 05:55:57,223 WARN [main] org.apache.nifi.web.server.JettyServer Failed to start web server... shutting down. 2018-11-14 05:57:38,552 WARN [main] o.e.j.webapp.StandardDescriptorProcessor Duplicate mapping from / to default 2018-11-14 05:57:38,618 WARN [main] org.apache.nifi.web.server.JettyServer Failed to start web server... shutting down. 2018-11-14 05:58:41,971 WARN [main] o.e.j.webapp.StandardDescriptorProcessor Duplicate mapping from / to default 2018-11-14 05:58:42,043 WARN [main] org.apache.nifi.web.server.JettyServer Failed to start web server... shutting down. ERROR: 2018-11-14 05:14:55,402 INFO [main] org.apache.nifi.web.server.JettyServer Loading WAR: /Users/jonas/nifi-1.7.1/./work/nar/framework/nifi-framework-nar-1.7.1.nar-unpacked/META-INF/bundled-dependencies/nifi-web-error-1.7.1.war with context path set to / 2018-11-14 05:15:08,223 INFO [main] o.e.jetty.server.handler.ContextHandler Started o.e.j.w.WebAppContext@36d02719{/,file:///Users/jonas/nifi-1.7.1/work/jetty/nifi-web-error-1.7.1.war/webapp/,AVAILABLE}{./work/nar/framework/nifi-framework-nar-1.7.1.nar-unpacked/META-INF/bundled-dependencies/nifi-web-error-1.7.1.war} 2018-11-14 05:36:27,318 INFO [main] org.apache.nifi.web.server.JettyServer Loading WAR: /Users/jonas/nifi-1.7.1/./work/nar/framework/nifi-framework-nar-1.7.1.nar-unpacked/META-INF/bundled-dependencies/nifi-web-error-1.7.1.war with context path set to / 2018-11-14 05:36:40,557 INFO [main] o.e.jetty.server.handler.ContextHandler Started o.e.j.w.WebAppContext@f714749{/,file:///Users/jonas/nifi-1.7.1/work/jetty/nifi-web-error-1.7.1.war/webapp/,AVAILABLE}{./work/nar/framework/nifi-framework-nar-1.7.1.nar-unpacked/META-INF/bundled-dependencies/nifi-web-error-1.7.1.war} 2018-11-14 05:55:43,434 INFO [main] org.apache.nifi.web.server.JettyServer Loading WAR: /Users/jonas/nifi-1.7.1/./work/nar/framework/nifi-framework-nar-1.7.1.nar-unpacked/META-INF/bundled-dependencies/nifi-web-error-1.7.1.war with context path set to / 2018-11-14 05:55:57,211 INFO [main] o.e.jetty.server.handler.ContextHandler Started o.e.j.w.WebAppContext@404a7c61{/,file:///Users/jonas/nifi-1.7.1/work/jetty/nifi-web-error-1.7.1.war/webapp/,AVAILABLE}{./work/nar/framework/nifi-framework-nar-1.7.1.nar-unpacked/META-INF/bundled-dependencies/nifi-web-error-1.7.1.war} 2018-11-14 05:57:25,378 INFO [main] org.apache.nifi.web.server.JettyServer Loading WAR: /Users/jonas/nifi-1.7.1/./work/nar/framework/nifi-framework-nar-1.7.1.nar-unpacked/META-INF/bundled-dependencies/nifi-web-error-1.7.1.war with context path set to / 2018-11-14 05:57:38,608 INFO [main] o.e.jetty.server.handler.ContextHandler Started o.e.j.w.WebAppContext@16a83016{/,file:///Users/jonas/nifi-1.7.1/work/jetty/nifi-web-error-1.7.1.war/webapp/,AVAILABLE}{./work/nar/framework/nifi-framework-nar-1.7.1.nar-unpacked/META-INF/bundled-dependencies/nifi-web-error-1.7.1.war} 2018-11-14 05:58:28,489 INFO [main] org.apache.nifi.web.server.JettyServer Loading WAR: /Users/jonas/nifi-1.7.1/./work/nar/framework/nifi-framework-nar-1.7.1.nar-unpacked/META-INF/bundled-dependencies/nifi-web-error-1.7.1.war with context path set to / 2018-11-14 05:58:42,033 INFO [main] o.e.jetty.server.handler.ContextHandler Started o.e.j.w.WebAppContext@428e875f{/,file:///Users/jonas/nifi-1.7.1/work/jetty/nifi-web-error-1.7.1.war/webapp/,AVAILABLE}{./work/nar/framework/nifi-framework-nar-1.7.1.nar-unpacked/META-INF/bundled-dependencies/nifi-web-error-1.7.1.war} ... View more