If you are using the UpStream Custom Fields Extension Nulled for the first time, make sure you have downloaded and installed the extension. These articles will help you get started:
The Custom Fields extension allow you to create all sorts of extra information for your projects, milestones, tasks, bugs, and files. For example, in a web design project, the bugs could have fields for the browser type, PHP version, and screen size.
Changelog [1.10.1] – 2020-12-07 = * Fix sanitization bug