8
Much grateful to those who tried to help.
Anyway, i got into System/Admin, but the left part is absent and the following error/
Warning [PHP]: xoops_cp_header(/home/flofik/public_html/xoops/cache/adminmenu.php): failed to open stream: No such file or directory in file include/cp_functions.php line 55
Warning [PHP]: xoops_cp_header(): Failed opening '/home/flofik/public_html/xoops/cache/adminmenu.php' for inclusion (include_path='.:/usr/lib/php:/usr/local/lib/php') in file include/cp_functions.php line 55
Notice [PHP]: Undefined variable: xoops_admin_menu_js in file include/cp_functions.php line 72
Warning [PHP]: xoops_cp_footer(/home/flofik/public_html/xoops/cache/adminmenu.php): failed to open stream: No such file or directory in file include/cp_functions.php line 159
etc
McNaz was absolutely right - the problem is in adminmenu.php file. It exists, but cannot be opened. I tried deleting, but it wasn't configured. The wants some index file in cache folder now?