I just bought the plugin and installed in my osclass site but the plugin doesnt work. Every time i click on favorite icon it gives me in the console the error :  "ERROR on AJAX: error" i checked the osclass error log file for errors but is empty. I installed the latest version of the "Favorite items plugin" and also checked for write permissions. Everything is ok but the plugin doesnt work.

Need some help please.

Ok after deleting and reinstalling it, the plugin works just fine. Mark this as SOLVED

Cool