Total website not available anymore

Solved it, by first getting back to the admin panel.

Then removed the bloody plugin!

Here are my steps:
Step 1.
first enabled debugging mode
You can also use the WordPress debug function to see what type of errors are being outputted. Add the following code in your wp-config.php file.
view source
print?
1 error_reporting(E_ALL); ini_set(‘display_errors’, 1);
2
3 define( ‘WP_DEBUG’, true);
http://www.wpbeginner.com/wp-tutorials/how-to-fix-the-wordpress-white-screen-of-death/

Step 2.
It appears there is an error in my functions.php of my theme. It was the last part of the file.
There was a problem with this last part. Removing it brought helped me getting back the login page.

<?php }
add_action( “woocommerce_thankyou”, “ia_wc_ga_integration” );
?>