phpmyadmin not working on mamp

Question

I just install mamp pro, i tried to open localhost:8888. it's work. but when i tried to open phpMyAdmin, it's not work. when i open mysql in terminal (iterm2), it works, i can do some query, but when i open up http://localhost:8888/phpMyAdmin/, it shown :

This page isn’t working
localhost didn’t send any data.
ERR_EMPTY_RESPONSE

MySQL preference in MAMP, the MySQL 5.7.25 is configured to use port 8889. but when i open up http://localhost:8889/phpMyAdmin/ the display still same.

when i click WebStart button on MySQL tab, the display still same. is there any solution how to fix it?