User can't login using student-login link on coursepress pro

Hello

I'm still having issues with the coursepress site
When registered users try to login at http://mibuho.com/student-login/ then basically nothing happens, the browser says WAITING FOR MIBUHO.COM and thats it
They can't login, nor do they receive an error message, it just shows the spinning wheel

This started after i updated to the last version

I did disable all plugins, except the ones i really need to run coursepresspro and even tested with a generic theme,

Any ideas what happens here. Does anyone here has similar problems?