php错误从文本区域获取值

Hey guys I'm having trouble capturing the value from my textarea in this form, I can read the first values of name and email but when the php code tries to read the Message of textarea it returns an error. Can someone please help me figure out what is wrong with my code? By the way I am still writing here since I need to fill up this space but this sentence is not really relevant to the question. Thanks!Hey guys I'm having trouble capturing the value