I install sharepoint server 2016, and when i try to create a new web application, the button is disabled, i add role for my system account but it is same, i use Chrome
Try to start the Central Administration site on the server using the link created during the installation Start> (type "Central Admin"). It should run the default browser "as administrator".
Finally i found a sollution, it's stupid but work, i change internet option of IE to local internet and i change setting like image, finally i run IE as admin