Hey @jurecuhalev ,
Thanks for your post. You are correct that this is an error message a few folks are running into. Our developers are aware of this problem and working towards a fix to push out as soon as possible, though in the meantime, one user has posted a code change that appears to be resolving the issue for most users. If you’d like to check out that workaround, it can be found here on the forums: https://www.ads-software.com/support/topic/missing-argument-3-for-mailchimp_apiget/
If that workaround does not solve the issues you’re seeing, we can certainly take a closer look into things. If possible, could you provide the following details so we can take a closer look?
– the PHP version running on the WordPress site
– the theme being used for this site
– the version of WordPress currently installed
– a list of all active plugins running on the site when this error appears
Thanks,
Malachite