That's not actually what's wrong, your config.json was correct. The problem is your nginx config is wrong. Follow the docs here.Ubuntu (Recommended) - NodeBB Documentation
nodebb-plugin-imagemagick doesn't work (v1.9.2)
Couldn't find convert. Did you install imagemagick?
Did you install the imagemagick package on your system?
@pitaj Yes, I solved it but i wanna animated avatars