Hi bud! :)
Genshin Impact uses a kernel-level anti-cheat. It is likely blocking GameTranslate from accessing its Window. Another user had a similar problem with 'Wuthering Waves'. Try to launch both GameTranslate & Genshin Impact in administrator mode.
In case this isn't the problem - Which mode are you trying to use with Genshin Impact? Desktop, Attached or Internal?
Thank you!