Remove UTF-8 from slug

Hello,

I'm always use the plugin Remove UTF-8 from slug for my Vietname language. But when i'm using the plugin for my new site , it's now conflict with the footer, the footer has been gone when i actived the plugin.

Is there any different way to remove UTF-8 from slug?

p/s: you can using grant access to take a closer look in the plugin, if you wish.

Thanks,
Tuan.