500.0 - Internal Server Error Wordpress import .xml Error

[Amir Hossein Yaghouti]

500 - Internal server error.
There is a problem with the resource you are looking for, and it cannot be displayed.
wordpress-import.xml

Why?
not show error or log error.

 

[Amir Hossein Yaghouti]

post_max_size
upload_max_filesize
php.ini and change php v more sting change but not work, why?
plz help me for fixed.
thank you.