In fact, an error was reported the first time, an error message!
POST http://tp5.com/admin/user/checklogin.html 500 (Internal Server Error)
send @ jquery.min.js:5
ajax @ jquery.min.js:5
(anonymous) @ login:83
dispatch @ jquery.min.js:3
v.handle @ jquery.min. js:3
Same error, no solution
Open the browser console to view the specific reasons for the ajax error