This error shows up whenever I use different characters in Select query like このファイルをテス and use it on sql..
SQLSTATE[HY000]: General error: 1267 Illegal mix of collations (latin1_swedish_ci,IMPLICIT) and (utf8_unicode_ci,COERCIBLE) for operation '=' (SQL: select * from folders
where folder_name
= このファイルをテスト)