Luke wrote
I have just try disabling the plugins. Unfortunately, even when all plugins are disables, the issue is still there.
Weird. Did you make any other changes to the userstyles except those you already mentioned?
Luke wrote
Even more weird, I realized that after modifying the userstyle.css by adding the lines :
div.dokuwiki a.wikilink1 :link{
color: #006600 !important;
}
[...]
some links still doesn't show when others are correctly displayed in green...
First of all, there are various types of links in DokuWiki. The type you changed there ("wikilink1") is only for links to *existing* pages. "wikilink2" would be for links to *missing* pages. And then there are external links and email links and media links, etc. The best would be to only style links without any classes (so, *all* links), but that depends on what you're trying to achieve.
The first line has a typo: The space between
a.wikilink1[/m] and [m]:link should be removed.