when selecting from the main menu "3rd Party extensions-> K2 -> Items or Users or Latest items" (no problem when selecting "categories" or "tags" though) then I get the error message:
Fatal error: require() [function.require]: Failed opening required '/siteName/modules/mod_k2_content/tmpl/no_plugin/default.php' (include_path='.:/Applications/xampp/xamppfiles/lib/php') in '/siteName/modules/mod_k2_content/mod_k2_content.php on line 35
Sure, the folder "no-plugin" (as stated in the error message) does not exist, but why that/what's the problem? (a "default.php" exists in /tmpl/Default/ )
"Information" section in K2 backend confirms all listed directories writable, ALL modules and plugins (!!) are installed and enabled.
The entire installations is up-to-date to the latest Joomla, template and extensions versions.
Thanks for advising!