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Hi!
There is php error during subscription from this site – https://iago.chat/
You can check it in your browser – https://prntscr.com/bmng0e
But if you will try to subscribe using this site address – https://www.iago.chat – subscription will be successful.
You need to configure your server in such way in order to redirect your users to this website address – https://www.iago.chat. Please contact your hosting provider, they should help you with this.

If you will have any problems with this – contact us through our?internal support. We will help you to solve the problem.

Thanks guys – it’s working now!

Hello!
No problems, it’s always a big pleasure to help our users.

Also in such cases you can try simply to set the same url address for your site in WordPress General Settings (Settings -> General) – https://prntscr.com/bmyeug