Hi,
Yes, you are right, the problem was the GD booster. When I disabled it everything works.
What now with cache plugin? Should I install a new?
To enable franchise, please go to the link and first select a package (as on screen).
https://polskiebiznesy.directory/dodaj-ogloszenie/?listing_type=gd_place
P.S. Where did you find what plugin caused the problem. Could you give me any tips?
Thanks.