W3TC adds "Minified using disk: basic (DONOTMINIFY constant is defined)" to every page in the code of my site, so minifying is not working. But I did NOT do anything to NOT minify the site.
I have discovered that it has to do with my theme, because with another theme minifying does work.
I've used this theme for a longer time and previously minifying worked well! I really don't know what has changed. I've updated several plugins of course, but when I disable them (exept W3TC) then minifying still doesn't work.
Can anybody help me?