Get error "Notice: Undefined index:" when accessing webforms

I get this error when trying to see a block webform:
Notice: Undefined property: stdClass::$content a webform_block_view() (línia 1931 de /home/llunydec/public_html/sites/all/modules/webform/webform.module).

And this one when trying to see another webform (non-block)

Notice: Undefined index: formulari_enllacos a _exclude_node_title() (línia 238 de /home/llunydec/public_html/sites/all/modules/exclude_node_title/exclude_node_title.module).
Notice: Undefined index: formulari_enllacos a _exclude_node_title() (línia 238 de /home/llunydec/public_html/sites/all/modules/exclude_node_title/exclude_node_title.module)

Any ideas?