error "View results"

When I click on "View results" I get this message:

warning: Invalid argument supplied for foreach () in / home / xxxx / public_html / domain.com / sites / all / modules / CCK / content.module on line 1335.
And the field "Type" is empty, and when I click on "Edith" then comes this message:

warning: call_user_func_array () [function.call-user-func-array]: First argument is expected to be a valid callback, '_node_form' was given in / home / xxxxx / public_html / domain.com / includes / form.inc Wed line 371

When you are finished with Quiz I get this message:

user warning: Table 'webnybzm_webnytt.node' doesn't exist query: SELECT r.*, n.changed, n.title FROM eucip_classroom_response AS r, node AS n WHERE r.nid = n.nid AND n.uid = 1 AND r.assignment_nid = 114 in /home/webnybzm/public_html/eucip/sites/all/modules/classroom/classroom.assignments.inc on line 622.
warning: Invalid argument supplied for foreach() in /home/xxxxxx/public_html/xxxxxxx/sites/all/modules/filefield_paths/filefield_paths.module on line 352.
warning: Invalid argument supplied for foreach() in /home/xxxxxxxx/public_html/xxxxxx/sites/all/modules/cck/content.module on line 1295.
warning: Invalid argument supplied for foreach() in /home/xxxxxxx/public_html/xxxxxxxx/sites/all/modules/cck/content.module on line 1335.
warning: Invalid argument supplied for foreach() in /home/xxxxxxxxx/public_html/xxxxxx/sites/all/modules/cck/content.module on line 1335.
warning: Invalid argument supplied for foreach() in /home/xxxxxxx/public_html/xxxx/sites/all/modules/cck/includes/content.token.inc on line 39.
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 11 query: INSERT INTO xxxxx_subscriptions_queue (uid, name, mail, language, module, field, value, author_uid, send_interval, digest, last_sent, load_function, load_args, is_new) SELECT u.uid, u.name, u.mail, u.language, s.module, s.field, s.value, s.author_uid, s.send_interval, su.digest, COALESCE(sls.last_sent, 0), 'subscriptions_content_node_load', '122', '1' FROM xxxxx_subscriptions s INNER JOIN eucip_subscriptions_user su ON s.recipient_uid = su.uid INNER JOIN eucip_users u ON su.uid = u.uid LEFT JOIN eucip_subscriptions_last_sent sls ON su.uid = sls.uid AND s.send_interval = sls.send_interval WHERE s.module = 'node' AND s.field = 'type' AND s.author_uid IN (1, -1) AND in /home/xxxxxxx/public_html/xxxxxx/sites/all/modules/subscriptions/subscriptions.module on line 339. 

what is wrong ?