Update mailchimp-api-php ASAP to fix broken API requests

I am also having problems after upgrading to 3.0.0-rc4. My code calls MailchimpLists->getSegments(), which gives rise to the error:

Call to a member function request() on string in Mailchimp\MailchimpLists->getSegments() (line 595 of /home/xxx/yyy/zzz/vendor/thinkshout/mailchimp-api-php/src/MailchimpLists.php)

MilchimpLists extends MailchimpApiUser, and line 595 is:

return $this->api_class->request('GET', '/lists/{list_id}/segments', $tokens, $parameters);

So, it looks like a problem with $this->api_class.
This might not be the same as the originally reported problem, but I suspect it is related.
Downgrading back to v2.1.3 fixes the problem.

I am not sure if @dabley's issue is related, however it looks like since mailchimp-api-php has release release candidate 6 with the API fix included we can now update the version dependency of mailchimp module.

I am also get this issue when I upgraded to version 2.2.0

Error: Call to a member function request() on string in Mailchimp\MailchimpLists->getMemberInfo() (line 354 of /var/www/xxx/yyy/vendor/thinkshout/mailchimp-api-php/src/MailchimpLists.php) 

Just wanted to let folks know we're on this and will address within the week.

Just rolled a new release that includes a fix for this.

Automatically closed - issue fixed for 2 weeks with no activity.

I tried on the 2.2.2 version and I am still getting the following error

`Error: Call to a member function request() on string in Mailchimp\MailchimpLists->getMemberInfo()`

Here is my code snippet below that subscribes a user to a list once they complete the checkout process.

      /** @var \Drupal\commerce_order\Entity\OrderInterface $order */
      $order = $event->getEntity();
      $config = Drupal::config('mailchimp.settings');
      $api_key = $config->get("api_key");
      $mailChimpLists = new MailchimpLists($api_key);
      $listID = '123456789';
      $email = $order->getEmail();

      try {
        $member = $mailChimpLists->getMemberInfo($listID, $email);
      }
      catch (Exception $exception) {