I had this problem once before, when I moved my website from a web hosting to another.
But this file no longer exists. This obiously break all my js by the way.
I have tried to uninstall/reinstall it, but seems like some data are kept even in this case. For example, even the caching expire timing was back to what I set it (86400 seconds) after a reinstall.
So my guess is this is somewhere in the database. But couldn't find anything relevant there.
How can I manage to deal with this ?
I have to add that only happens with JS minified file, never with CSS.
Last time, I tried to install Better WP Minify, which was triggering even more problems. Went back to test WP minify further.. and it was working again ! Never found out what helped me.
I hope the developer will have a look at all those threads and do some debugging sometimes, because his plugin is the most efficient one out there (W3 Total Cache is supposed to do it too, but it hasn't been updated in a while and triggers also some problems on my theme)
Anyway, your thoughts on this are very welcome !