Ok, fixed.
' Problem ' was in serendipity_plugin_freetag.
To be precise, not a problem, more like ... dunno maybe bug?
Untitled.png
Default input value @ field on picture is 2 . Since there was no 2 similar tags (it is fresh installation)
message was displayed.
It is kinda "persuasive", and I ...

Yes, (event plugin tab) it is installed
And tags are defined on few entries.

Yet message is same, when you click on Archive -> Older ...

Hi all,
when I go to categories => older on my new installed timeline theme
I get this message

s9y_tags_message.png

I have two plugins installed named "serendipity_plugin_freetag".
One in Sidebar plugins, and other in Event plugins.
The one in Sidebar plugins, has sidebar template option ...