Code with warning appears on header after updating to the last version

I updated to 4.7.6.3 and php 7.4.9 and I started to receive the following code on my website in back and front end ( https://shop.arturolaime.com )

Warning: Use of undefined constant �FORCE_SSL_LOGIN� – assumed ‘�FORCE_SSL_LOGIN�’ (this will throw an Error in a future version of PHP) in /home/www/shop/wp-config.php on line 57

Warning: Use of undefined constant �FORCE_SSL_ADMIN� – assumed ‘�FORCE_SSL_ADMIN�’ (this will throw an Error in a future version of PHP) in /home/www/shop/wp-config.php on line 58

Warning: Cannot modify header information – headers already sent by (output started at /home/www/shop/wp-config.php:57) in /home/www/shop/wp-includes/functions.php on line 6270

Warning: Cannot modify header information – headers already sent by (output started at /home/www/shop/wp-config.php:57) in /home/www/shop/wp-admin/includes/misc.php on line 1310

Warning: Cannot modify header information – headers already sent by (output started at /home/www/shop/wp-config.php:57) in /home/www/shop/wp-admin/admin-header.php on line 9

I deactivated woocommerce and the security plugins but nothing changed. Please, I would appreciate some help.