Finally I found a solution by manually deactivating the plugin and replace the url in config by http://www.example.com
Update of my problem :
After digging in the wp-login.php via FTP, I found these lines :
“// Redirect to https login if forced to use SSL
if ( force_ssl_admin() && ! is_ssl() ) {
if ( 0 === strpos($_SERVER[‘REQUEST_URI’], ‘http’) ) {
wp_redirect( set_url_scheme( $_SERVER[‘REQUEST_URI’], ‘https’ ) );
exit();
} else {
wp_redirect( ‘https://’ . $_SERVER[‘HTTP_HOST’] . $_SERVER[‘REQUEST_URI’] );
exit();
}
}”
Do you think deleting these line will be enough to solve my problem ?