HTML file lost style and picture after OJS3 upgrade

I upgraded OJS from 2.8 to 3.0.2 and activated HTML Article Galley plugin.
If I click, as reader, on HTML button to read the published articles now I see plain HTML files without style.
I tried to add a css file in Settings > Website > Journal style sheet, but is useless.

From Chrome Developer Tool I see the link to my css

<link rel="stylesheet" href="" type="text/css">

but is unable.

Moreover, all the links to the pictures of my articles are wrong: I cant’ see any picture in my HTMLs, just text.

Thank you.

Hi @Enzo,

See e.g. OJS HTML articles.

Alec Smecher
Public Knowledge Project Team