GUI disappeared in android studios

Question

enter image description here I have no idea what happened considering that I have not touched the XML code at all. enter image description here I just opened Android Studios to work on the project and these errors (including the fact that for some reason I cannot seem to access the GUI anymore) have popped up. Below are screen shots of the errors. What happened and how can I fix it?enter image description here enter image description here

Answer 1

我不得不更新插件，事实证明-解决了我的问题