Hello ,this TypeError: crypto.randomUUID is not a function occurs because the environment in which you are running your application does not support the crypto.randomUUID() function. It is a versioning problem, either you solve the Polyfill from the code, or you can add this extension: Once installed, create a new script and add this code. (function() { 'use strict'; if (typeof crypto.randomUUID !== 'function') { crypto.randomUUID = function () { return 'xxxxxxxx-xxxx-4xxx-yxxx-xxxxxxxxxxxx'.replace(/[xy]/g, function(c) { var r = Math.random() * 16 | 0, v = c === 'x' ? r : (r & 0x3 | 0x8); return v.toString(16); }); }; } })(); Or you can generate a static UUID from here:: https://www.uuidgenerator.net/version4 Enable developer mode in your browser, restart the extension, and then you will be able to see your started Nifi normally. Use this for test scenarios.     ... View more