MAMP mac not able to see admin panel

Hello
It first time i am working with localhost.
I use MaMp for mac 3.4, my os is 10.9.5.

Everything was working fine yesterday.
Now when i go to http://localhost:8888/site_maximearchambault/wp-admin/
The page stay white event after loading.
Not able to log in.
If i try to go to any dashboard page it the same thing.
I can go to my site http://localhost:8888/site_maximearchambault/
all page are working.

I use yoast seo plugin i think it a permalink problem related to that.

Any help on how to reset the permalink with MaMp mac.
I am beginner level,explanation need to be detail.

thanks for any help