Error validating access token: The session has been invalidated because the user

Hi people:

1º) Congratulations for the plugins i think that is perfect.

2º) My problem: Few days ago when i click in “Installed Plugins” the list of it doesn’t appear but i recive the following error:

Fatal error: Uncaught exception 'Facebook\Exceptions\FacebookAuthenticationException' with message 'Error validating access token: The session has been invalidated because the user has changed the password.' in /var/www/vhosts/castillodezaliaconjuntorural.com/httpdocs/wp-content/plugins/fb-instant-articles/vendor/facebook/php-sdk-v4/src/Facebook/Exceptions/FacebookResponseException.php:89 Stack trace: #0 /var/www/vhosts/castillodezaliaconjuntorural.com/httpdocs/wp-content/plugins/fb-instant-articles/vendor/facebook/php-sdk-v4/src/Facebook/FacebookResponse.php(210): Facebook\Exceptions\FacebookResponseException::create(Object(Facebook\FacebookResponse)) #1 /var/www/vhosts/castillodezaliaconjuntorural.com/httpdocs/wp-content/plugins/fb-instant-articles/vendor/facebook/php-sdk-v4/src/Facebook/FacebookResponse.php(255): Facebook\FacebookResponse->makeException() #2 /var/www/vhosts/castillodezaliaconjuntorural.com/httpdocs/wp-content/plugins/fb-instant-articles/vendor/facebook/php-sdk-v4/src/Facebook/FacebookResponse.php(82): in /var/www/vhosts/castillodezaliaconjuntorural.com/httpdocs/wp-content/plugins/fb-instant-articles/vendor/facebook/php-sdk-v4/src/Facebook/Exceptions/FacebookResponseException.php on line 89

How can i solve it?

Many thanks