Snippet not inserted (even in a clean installation of dokuwiki)

[geckon]

Hi, I've got two instances of dokuwiki - one has modified settings and the second one has default settings. In any of them this plugin doesn't work.

In the first one:
If I use version without "DOKU_BASE" in URL in action.php it doesn't work (page not found problem). So I added “DOKU_BASE” to the url in the file action.php. Now when I want to use snippets plugin the pop-up window (with list of my snippets) opens but it's impossible to insert snippet to the page. When I try this the pop-up window closes and nothing else happens.

In the second one (clean installation):
In this instance of wiki "works" both version (with and without "DOKU_BASE"), but there is the same problem - the pop-up window just opens but it is impossible to insert snippet to the page.

/conf/local.php of the first one:

[geckon]

I can confirm this issue in the newest dokuwiki and newest plugin version.