Update – I tried this path:
/home/klikerlab/domains/klikerlab.pl/wp-content/gallery/kliker/
and also this:
klikerlab.pl/wp-content/gallery/kliker/
and other combinations but nothing works 🙁
Another update… I removed all plugins and downloaded again Next Gen, created album, uploaded photo, linked to the page where I want to have gallery – all worked, and I can preview the image in my dashboard. This catalog has 777 permission (I don’t know why, because I didn’t do it).
But, still, the image doesn’t appear on the website…
any ideas?
Now it works, with above settings.