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Hello @alex-h-1,

I trust you’re doing well!

Please make sure that there is at least one email added to the MailChimp list. If the API key on MailChimp was created a long time ago, please create a new API Key and add it to Opt-ins Basic SetUp.

Make sure that after entering MailChimp API, you’ve added a list from the drop-down.

If the issue still persists, please enable WordPress debug. Add the following defibe rules to the wp-config.php file:

define( 'WP_DEBUG', true );
define( 'WP_DEBUG_LOG', true );
define( 'WP_DEBUG_DISPLAY', false );

Insert these lines above /* That's all, stop editing! Happy blogging. */ line. Try signup for a newsletter by adding a real email address. This way all errors will be saved in the debug.log file inside the /wp-content/ directory. Share the debug.log here with us.

Please advise,

Kind regards
Nastia

I managed to get it fixed! That was the issue, I didn’t hit ‘GET LISTS’ and select my list.

Thanks so much for responding so promptly!

Cheers,

Alex