ERROR in minimizer function doesn't return the 'data' property or result is not a 'Buffer' value

[myarmolinsky]

What were you expecting to happen?

I expected to get the minimized .svg files.

What actually happened?

I get errors for each of my svg files: ERROR in minimizer function doesn't return the 'data' property or result is not a 'Buffer' value
Note: I only see this in production mode, development mode doesn't show any errors

Please give us a sample of your webpack.config.js

...
const ImageMinimizerPlugin = require('image-minimizer-webpack-plugin');
...
config = {
  ...
  optimization: {
    ...
    minimizer: [
      ...
      new ImageMinimizerPlugin({
	minimizer: {
	  implementation: ImageMinimizerPlugin.imageminMinify,
	  options: {
	    // Lossless optimization with custom option
	    plugins: [
	      ['gifsicle', { interlaced: true }],
              ['jpegtran', { progressive: true }],
	      ['optipng', { optimizationLevel: 5 }],
	      // Svgo configuration here https://github.com/svg/svgo#configuration
	      [
	        'svgo',
	        {
	          plugins: [
		    {
		      name: 'preset-default',
		      params: {
		        overrides: {
		          removeViewBox: false,
		          addAttributesToSVGElement: {
			    params: {
			      attributes: [{ xmlns: 'http://www.w3.org/2000/svg' }],
			    },
		          },
		        },
		      },
		    },
	          ],
	        },
	      ],
	    ],
	  },
        },
      }),
      ...
    ]
    ...
  }
  ...
}

Terminal output / screenshots

The following is displayed for each svg file:

ERROR in ./src/img/usage.svg
Module Error (from ./node_modules/image-minimizer-webpack-plugin/dist/loader.js):
minimizer function doesn't return the 'data' property or result is not a 'Buffer' value
// there's also a stack trace after this ^ but it doesn't have anything about imagemin, only my codebase

After the above is displayed for each file, I see the following error repeated 24 times: ERROR in minimizer function doesn't return the 'data' property or result is not a 'Buffer' value

Please provide the following information:

OS & version: Windows 11 Pro version 22H2 build 22621.3737
node version (run node -v): 20.14.0
npm version (run npm -v): 10.7.0
Webpack version (run npx webpack -v): 5.91.0
imagemin version: 9.0.0
imagemin-svgo: 11.0.1