Hi,
I have placed mediawiki itself in a WAMP folder under Program Files. For easier backups, I have placed my Images folder under my www (php source) root, and created an Alias in httpd.conf, ie www/mw/images.
This seems to work fine for displaying images - but not when uploading an image. The new file gets placed under WAMP\mediawiki\images, but is then looked for (and of course not found) under www/mw/images. I can "solve" this by copying (or moving?) the file manually into www/mw/images (I don't often add images), but I thought you might be interested in the issue anyway.
My setup: Apache/2.4.33 (Win64) PHP/7.2.11 mediawiki-1.31.1