Android Studio - “我的.gwt.xml文件中未注册URI（设置|语言和框架|模式和DTD）”

I'm having a really strange issue. I'm a few days into work on a new android studio project with LibGDX, as a relative beginner to android/android studio/java/LibGDX, and I have just been trying to learn using VCS with GitHub so that I could make changes without worrying about damages.I'm having a really strange issue. I'm a few da