Updated How to set up WooCommerce development environment (markdown)

How-to-set-up-WooCommerce-development-environment.md

@@ -89,6 +89,16 @@ _If this happens, increase the `memory_limit` setting in your php.ini configurat
 
 _Alternatively, you might encounter 'Maximum function nesting level reached' error from xDebug. In that case, disable xDebug in your PHP installation temporarily._
 
+_Note: Sometimes, if you're using an old version of `pnpm`, you may see an error such as the following..._
+
+```
+❯ pnpm nx build woocommerce-legacy-assets
+
+> nx run woocommerce-legacy-assets:build 
+/bin/sh: 1: pnpx: not found
+```
+_If you see this type of error, update your `pnpm` to fix it._
+
 To automatically rebuild the assets whenever a JS or SCSS file is modified run:
 
 ```