Cannot connect to Paypal

in the WordPress critical error email got the following:

Error Details
=============
An error of type E_ERROR was caused in line 812 of the file /home/thibautg/domains/kokorowebanimation.com/public_html/wp-content/plugins/easy-digital-downloads/includes/gateways/paypal/admin/connect.php. Error message: Uncaught TypeError: hash_equals(): Argument #1 ($known_string) must be of type string, bool given in /home/thibautg/domains/kokorowebanimation.com/public_html/wp-content/plugins/easy-digital-downloads/includes/gateways/paypal/admin/connect.php:812
Stack trace:
#0 /home/thibautg/domains/kokorowebanimation.com/public_html/wp-content/plugins/easy-digital-downloads/includes/gateways/paypal/admin/connect.php(812): hash_equals()
#1 /home/thibautg/domains/kokorowebanimation.com/public_html/wp-includes/class-wp-hook.php(324): Easy_Digital_Downloads->EDD\Gateways\PayPal\Admin\{closure}()
#2 /home/thibautg/domains/kokorowebanimation.com/public_html/wp-includes/class-wp-hook.php(348): WP_Hook->apply_filters()
#3 /home/thibautg/domains/kokorowebanimation.com/public_html/wp-includes/plugin.php(517): WP_Hook->do_action()
#4 /home/thibautg/domains/kokorowebanimation.com/public_html/wp-admin/admin.php(175): do_action()
#5 /home/thibautg/domains/kokorowebanimation.com/public_html/wp-admin/edit.php(10): require_once(‘…’)
#6 {main}
?thrown

Hi @tgoarant

Could you please open a ticket with our team here https://easydigitaldownloads.com/support/ and we will take a closer look at this?

Regards

Update: The issue has been resolved and it was caused by custom security rules added in the .htaccess file on the site.