Problem with Google Cloud Translation API plugin translation quality in Trados 2019

I use Google Cloud Translation API plugin (stock translation) in Trados 2019 for translating from Korean to English.

Machine translation quality is unsatisfactory and differs from the quality of translation produced by Google Translate browser version (translate.google.com/) . For instance, "그것이 우리의 목표입니다." is translated by Google Cloud Translation API plugin like "That is Our is the goal.", whereas Google Translate browser version (https://translate.google.com/) translates it like "That is our goal."

Could you please tell me what could be the cause of this problem and how could I resolve it.

Best regards,

Kahev