Exception in module-base.php

[User]

I get an Exception in module-base.php.
The problem is located in unsubscription.php. With the latest update, the function get_resubscribe_url was erroneously changed from

function get_resubscribe_url($user, $email = null, $duration = DAY_IN_SECONDS) {
return $this->build_action_url(‘r’, $user, $email, $duration);
}

to

function get_resubscribe_url($user, $duration = DAY_IN_SECONDS) {
return $this->build_action_url(‘r’, $user, $duration);
}

Detailed exception stack trace:
ErrorException: Warning: Object of class stdClass could not be converted to int
#0 /wp-content/plugins/newsletter/includes/module-base.php(500): NewsletterModuleBase::get_user_key
#1 /wp-content/plugins/newsletter/includes/module-base.php(1072): NewsletterModuleBase::build_action_url
#2 /wp-content/plugins/newsletter/unsubscription/unsubscription.php(61): NewsletterUnsubscription::get_resubscribe_url
#3 /wp-content/plugins/newsletter/unsubscription/unsubscription.php(316): NewsletterUnsubscription::hook_newsletter_replace
#4 /wp-includes/class-wp-hook.php(353): WP_Hook::apply_filters
#5 /wp-includes/plugin.php(206): apply_filters
#6 /wp-content/plugins/newsletter/includes/module.php(951): NewsletterModule::replace
#7 /wp-content/plugins/newsletter/classes/NewsletterEngine.php(328): NewsletterEngine::build_message
#8 /wp-content/plugins/newsletter/classes/NewsletterEngine.php(186): NewsletterEngine::send
#9 /wp-content/plugins/newsletter/classes/NewsletterEngine.php(48): NewsletterEngine::run
#10 /wp-content/plugins/newsletter/plugin.php(495): Newsletter::hook_newsletter
#11 /wp-includes/class-wp-hook.php(353): WP_Hook::apply_filters
#12 /wp-includes/class-wp-hook.php(377): WP_Hook::do_action
#13 /wp-includes/plugin.php(571): do_action_ref_array
#14 /wp-cron.php(191)

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