Membership Plugin

Hello,

My website was working fine but now the .com/wp-admin and .com/wp-login.php pages do not load.

Could it be Membership Plugin.
I am logged into the Dashboard because I saved the password, but no one else is able to login to the members section.

Since I am logged into the Dashboard already, should i disable membership plugin ? will it effect all the settings I made for this plugin ?

the link is:
kccreditservices.com/sales/
kccreditservices.com/sales/wp-admin
user: admin
pass: Sales$1999

Please help.