当您应该改为使用->时，您正在静态访问ajax()方法(使用::):

You're accessing the ajax() method statically (using ::), when you should be using -> instead:

if ($request->ajax()) {

使用Laravel日志文件

如评论中所述，Laravel可能在storage/logs/laravel.log中告诉了您这一点，并附带了很长的调用堆栈跟踪(您提到的行，以#38"和#39"开头).只需向上滚动到#1"之前，您就会找到罪魁祸首.

As mentioned in the comments, Laravel is probably telling you this in storage/logs/laravel.log, complete with a long call-stack trace (the lines that you mentioned, beginning with "#38" and "#39"). Just scroll up to before "#1" and you'll find your culprit.