Doesn't work – Custom Keyboard Cartoon Anime Manga : " Soul Eater Edition " Custom Color & Wallpaper Themes Review

I went into my settings and gave the app full access and it still didn't work please tell me what I'm doing wrong and if I'm Not fix the app
Review by Kishin1244 on Custom Keyboard Cartoon Anime Manga : " Soul Eater Edition " Custom Color & Wallpaper Themes.