Not creating subdirectory

[rightaway]

I followed the path used in the README which is a subdirectory of the output path, but nothing is getting created and there's no error message. The subdirectory doesn't exist but I'd expect that it would be created. If I have just the name of a path then the file gets produced.

[robertknight]

What are you trying to do and which path are you talking about?

[rightaway]

This path from the README new WebpackBundleSizeAnalyzerPlugin('./reports/plain-report.txt'), I'm running the webpack command and expecting the file to appear in that location but it doesn't. If I remove the leading directory reports/ part then it works.