Drupal - Po instalaci nefunguje a hlásí chybu

warning: array_fill() [function.array-fill]: Number of elements must be positive in /home/free/own.cz/z/zkouska11/root/www/includes/database.inc on line 253.
warning: implode() [function.implode]: Invalid arguments passed in /home/free/own.cz/z/zkouska11/root/www/includes/database.inc on line 253.
warning: array_keys() [function.array-keys]: The first argument should be an array in /home/free/own.cz/z/zkouska11/root/www/modules/user/user.module on line 513.
user warning: You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near ')' at line 1 query: SELECT p.perm FROM role r INNER JOIN permission p ON p.rid = r.rid WHERE r.rid IN () in /home/free/own.cz/z/zkouska11/root/www/modules/user/user.module on line 513.
warning: array_keys() [function.array-keys]: The first argument should be an array in /home/free/own.cz/z/zkouska11/root/www/modules/block/block.module on line 432.
warning: array_fill() [function.array-fill]: Number of elements must be positive in /home/free/own.cz/z/zkouska11/root/www/includes/database.inc on line 253.
warning: implode() [function.implode]: Invalid arguments passed in /home/free/own.cz/z/zkouska11/root/www/includes/database.inc on line 253.
warning: array_merge() [function.array-merge]: Argument #2 is not an array in /home/free/own.cz/z/zkouska11/root/www/modules/block/block.module on line 433.
user warning: You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near ') OR r.rid IS NULL) ORDER BY b.region, b.weight, b.module' at line 1 query: SELECT DISTINCT b.* FROM blocks b LEFT JOIN blocks_roles r ON b.module = r.module AND b.delta = r.delta WHERE b.theme = '' AND b.status = 1 AND (r.rid IN () OR r.rid IS NULL) ORDER BY b.region, b.weight, b.module in /home/free/own.cz/z/zkouska11/root/www/modules/block/block.module on line 433.