What I did was steps as below:
Result: The first load displays ok, but if click next step button, it will throw 405 error. No matter it is a step button or submit button. Same result.
Thanks so much in advance.
Have you added the below line of code to the <head> section in your layout/root view? I don't believe this is included by default in the 'Empty Project' template.
Note you also need this one inside the <body> at the bottom:
This is the one I am looking for. Thanks so much.