Fatal error issue

i get below error when i try to login to wp-admin

Fatal error: Uncaught Error: Call to undefined function get_current_screen() in /home/invejmuk/invention-group.com/wp-includes/script-loader.php:2407 Stack trace: #0 /home/invejmuk/invention-group.com/wp-includes/class-wp-hook.php(307): wp_global_styles_render_svg_filters('') #1 /home/invejmuk/invention-group.com/wp-includes/class-wp-hook.php(331): WP_Hook->apply_filters(NULL, Array) #2 /home/invejmuk/invention-group.com/wp-includes/plugin.php(476): WP_Hook->do_action(Array) #3 /home/invejmuk/invention-group.com/wp-includes/general-template.php(3074): do_action('wp_body_open') #4 /home/invejmuk/invention-group.com/wp-content/themes/archimak/functions.php(117): wp_body_open() #5 /home/invejmuk/invention-group.com/wp-settings.php(566): include('/home/invejmuk/...') #6 /home/invejmuk/invention-group.com/wp-config.php(120): require_once('/home/invejmuk/...') #7 /home/invejmuk/invention-group.com/wp-load.php(50): require_once('/home/invejmuk/...') #8 /home/invejmuk/invention-group.com/wp-admin/admin.php(34): require_once('/hom in /home/invejmuk/invention-group.com/wp-includes/script-loader.php on line 2407

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Also i get below error in wp-login page 

Warning: Cannot modify header information – headers already sent by (output started at /home/invejmuk/invention-group.com/wp-includes/script-loader.php:2414) in /home/invejmuk/invention-group.com/wp-login.php on line 462

Warning: Cannot modify header information – headers already sent by (output started at /home/invejmuk/invention-group.com/wp-includes/script-loader.php:2414) in /home/invejmuk/invention-group.com/wp-login.php on line 478

Warning: Cannot modify header information – headers already sent by (output started at /home/invejmuk/invention-group.com/wp-includes/script-loader.php:2414) in /home/invejmuk/invention-group.com/wp-includes/functions.php on line 6878
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