Thank you for your thorough response and please excuse my late reply, I’ve been veru busy but now I’m again determined to fix this.
I’ve just followed your instructions and enabled debug logging mode, but it doesn’t work. The debug file keeps empty. I doublechecked every step. Then I thought it maybe has to do with the fact I use Qforms on a multisite installation, on a subsite, so I imported the given form to the main site and tried sending it again, but the debug file is still empty.
What could I be doing wrong?
I remember adding a debug plugin a while ago, which I later deinstalled. Maybe it has something to do with this?
Thanks so much,