Getting PixelData from all Instances in a Series

Hello, I’m very new to OHIF, but I am using it as a viewer for a modular Cardiac CT platform. I wanted to load the full series from Orthanc and then send it to my Python Server, is that possible.
Other question, I’ve created a new button just to test how to do it, it works in browser, but still I receive a
"Unable to find tool “NewButton” for enabledElement in cornerstone when using it . Is there anything besides adding the command in the commandsModule.js and the mapping in toolbarButtons.js in mode?

Hope this is the correct place and way to ask this, pretty new to this Project and OpenSource in general.