jackyianqq on "When using wp-admin login show ERR_EMPTY_RESPONSE"

Hi all,

I'm using few wordpress 3.8 for my websites and there don't have any problem at all. But after one week, I try to login to admin panel, it show ERR_EMPTY_RESPONSE message. But this is only for wordpress 3.8. If I try same website which using wordpress 3.5 in the same hosting and it working well.Any idea to solve this problem?

Thanks & With warm regards,