Issue with anothe plugin

hi i’ve got a conflict with the plugin bpchat to let users chat together , i told the developper of the plugin and he told me that the issue come from the theme Kleo

here is the message : The problem is with the theme javascript file. Because of this theme javascript error my plugin javascript not executing. Please find the below image where I have found the problem. I have colored it to red. Please send this image to the theme author and ask them to fix it. My plugin will work properly after this fix.