Translation in Bulgarian

Hi thanks for awesome plugin. However i translated in Bulgarian but tranlsation files did not work for me i need to know were i mistakeing and were i need to give you transation file to add plugin updates.
files is with name side-cart-woocommerce-bg_BG.po side-cart-woocommerce-bg_BG.mo and i uploadet in language folder but plugin did not translate please help