Notice: Use of undefined constant     - assumed '   ' in _node_kl_installed_fields() (line 143 of /opt/lampp/htdocs/drupal.test/sites/all/modules/custom/node_kl/node_kl.install).
    Notice: Use of undefined constant     - assumed '   ' in _node_kl_installed_fields() (line 151 of /opt/lampp/htdocs/drupal.test/sites/all/modules/custom/node_kl/node_kl.install).
    Notice: Undefined index: module in _field_write_instance() (line 601 of /opt/lampp/htdocs/drupal.test/modules/field/field.crud.inc).
    Notice: Undefined index: module in _field_info_prepare_instance_display() (line 354 of /opt/lampp/htdocs/drupal.test/modules/field/field.info.inc).
    Notice: Undefined index: module in _field_info_prepare_instance_display() (line 354 of /opt/lampp/htdocs/drupal.test/modules/field/field.info.inc).
    Notice: Undefined index: module in _field_info_prepare_instance_display() (line 354 of /opt/lampp/htdocs/drupal.test/modules/field/field.info.inc).
    Notice: Undefined index: module in _field_info_prepare_instance_display() (line 354 of /opt/lampp/htdocs/drupal.test/modules/field/field.info.inc).