How to fix the Illegal mix of collations
In an ojs installation that uses multiple languages, there will be the possibility of errors due to different collation sets used between columns. This will happen when you access the detail article page, so you will find the following error: Fatal error: Uncaught Exception: DB Error: Illegal mix of collations (utf8_general_ci,IMPLICIT) and (utf8_unicode_ci,IMPLICIT) for operation …