I am getting following error while search some custom field in MT 5 Pro.
Can't use an undefined value as an ARRAY reference at /var/www/html/plugins/CustomFieldsSearch-0.2.5/lib/CustomFieldsSearch/App.pm line 558.
/CustomFieldsSearch-0.2.5/lib/CustomFieldsSearch/App.pm line 558.
Can someone please let me know the solution for this issue?
Reported on Movable Type 5

Are there some missed configuration values within your form tags?
(Not plugins, but html form code)
Seeing the error message, you seem to have brought an undefined values, so plugin couldn't get a correct array data.
I would recommend to report an issue to the plugin author.
http://code.google.com/p/customfieldssearch-mtplugin/issues/list