Login.php is blank and can’t get to admin

Hi there,
Creating a new topic as I’ve tried multiple solutions and nothing worked. So wp-admin page is working and then put in my login details and then loads a white screen wp-login.php.
When I turn debug on from config.php it shows the following:

The called constructor method for WP_Widget in Studiofolio_Vcard_Widget is deprecated since version 4.3.0! Use __construct()
And also plenty repeated errors on function.

I went to widgets.php and found 1 $this->WP_Widget and then changed to parent::__construct, then uploaded that widgets.php and still nothing..
I’ve changed the name of plugins and themes folder on the ftp and tried to login but again get to wp-admin put in my details and then goes to a blank login.php
Renamed .htaccess didn’t work. I’ve replaced the wp-admin folder only and wp-login.php from wordpress 4.5 and nothing. Any other ideas so I can get over this death screen?

Tried to contact devs of the Studiofolio theme but has been more than 72 hours and didn’t hear back. seems like they don’t support that theme anymore (got that info from envato).