Sir, I have built many kitchen cabinets, but I cannot make them PLUGINZ even though I converted them to the RBZ extension.
Please Help
You need to clarify what you are doing.
Your profile says you are using Free Plan of SketchUp. Is that the cracked version?
In addition, it is not clear whether you have written any Ruby code or have just made a collection of SketchUp models.
An rbz is a specifically structured archive of Ruby code files that use the SketchUp Ruby API to provide an extension to SketchUp. You cannot make an extension merely by changing the file to rbz.
Irrespective of the ‘legitimacy’ of your SketchUp version, you need to get a proper grasp of how Ruby/plugins/extensions work.
They are code separately from Sketchup, so ‘making’ an RBZ [which is a re-suffixed ZIP file containing a loader RB and a subfolder of help files…] is not as simple a renaming a file or folder, and hoping for the best…
There’s lots of guidance available about this - do some searching… and start simple…