No account exists with the provided key

Please can you assist – i’m trying to generate a free ssl certificate and test the plugin in my wordpress site, but keep getting the following error message. any ideas?

I have verified my account.

ERROR: CREATE_CLIENT:RuntimeException: No account exists with the provided key in /var/www/wp-content/plugins/wp-letsencrypt-ssl/lib/LEConnector.php:188
Stack trace:
#0 /var/www/wp-content/plugins/wp-letsencrypt-ssl/lib/LEConnector.php(227): WPLEClient\WPLEConnector->request(‘POST’, ‘https://acme-v0…’, ‘{“protected”:”e…’)
#1 /var/www/wp-content/plugins/wp-letsencrypt-ssl/lib/LEAccount.php(114): WPLEClient\WPLEConnector->post(‘https://acme-v0…’, ‘{“protected”:”e…’)
#2 /var/www/wp-content/plugins/wp-letsencrypt-ssl/lib/LEAccount.php(75): WPLEClient\LEAccount->getLEAccount()
#3 /var/www/wp-content/plugins/wp-letsencrypt-ssl/lib/LEClient.php(141): WPLEClient\LEAccount->__construct(Object(WPLEClient\WPLEConnector), 1, ‘naz@junglecayma…’, Array)
#4 /var/www/wp-content/plugins/wp-letsencrypt-ssl/classes/le-core.php(100): WPLEClient\WPLEClient->__construct(‘naz@junglecayma…’, false, 1, ‘/var/www/keys/’)
#5 /var/www/wp-content/plugins/wp-letsencrypt-ssl/classes/le-core.php(78): WPLE_Core->wple_create_client()
#6 /var/www/wp-content/plugins/wp-letsencrypt-ssl/classes/le-core.php(63): WPLE_Core->wple_generate_verify_ssl()
#7 /var/www/wp-content/plugins/wp-letsencrypt-ssl/admin/le_admin.php(352): WPLE_Core->__construct(Array)
#8 /var/www/wp-includes/class-wp-hook.php(288): WPLE_Admin->wple_save_email_generate_certs(”)
#9 /var/www/wp-includes/class-wp-hook.php(312): WP_Hook->apply_filters(NULL, Array)
#10 /var/www/wp-includes/plugin.php(478): WP_Hook->do_action(Array)
#11 /var/www/wp-admin/admin.php(170): do_action(‘admin_init’)
#12 {main}