@photoweblog Yes, I have tried absolute path, I thought at the beginning this might be caused by permalink settings, since I’ve changed permalink setting once, but changing it back didn’t work, and I’ve tried on my different sites, it never displays marker image.
I have a post asking about it in hanblog forum with images
wp-osm-plugin.hanblog.net/forums/topic/problem-displaying-an-image-in-a-marker/
Would you take a look, thanks!
