I installed D8 perfectly(I think so), but when I tried to edit the profile(or create a basic page), I input some message and clicked the “save” button, nothing saved and the page was still the original one. Also if I logged out, I can’t log in. After I input the correct username and password and clicked “login”, the page was still the login page and there’s no error message.
I re-installed several times but nothing changed. What should I do?