Unable to install image scale plugin

I am trying to install Image Scale Plugin but I'm getting warning message. Am I doing something wrong or there is something wrong with the zip file?

You are getting this message on plg_content_image_scale install:

Warning
JInstaller: :Install: Can't find Joomla XML setup file.
Error
Unable to find install package

Don't worry because ContentBuilder Image Scale Plugin is installed to ContentBuilder/Joomla! right away on the ContentBuilder install.

You can simply start using it right away.

That applies for other plugins from ContentBuilder installation folder - com_contentbuilder_joomla30/admin/plugins

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