@TiagoLoss 

Can you paste your DDNS config please?

We need more info if you want us to help.

  @Hoamboy 

The forum does not allow posting links.
I'm doing the config for duiadns.

[USERNAME] and [DOMAIN]; united to compose the domain because duia does not have a username. Example: domain: 1testdomain = USERNAME=1 / DOMAIN=testdomain

  @TiagoLoss 

Your domain name in Update URL does not match your domain name in the inside config:

duiadns [dot] net vs. duia [dot] us?

Try to use duiadns [dot] net for both entries - otherwise the DDNS service might be confused I guess.

Can you try?

Otherwise I've discussed this topice here already - in regards to the update URL and its variables:

https://community.tp-link.com/en/business/forum/topic/601112?replyId=1185452

  @Hoamboy 

https://www[dot]duiadns[dot]net

Use duckdns which is also giving error in TP-Link https://www[dot]duckdns[dot]org

  @TiagoLoss 

I am using noip [dot] com which is a native, built-in service and it works like a charm.

There's a free account available, too.

I am happy with it.

If that helps...

  @Hoamboy 

  @Hoamboy 

The no-ip free account needs to keep confirming the hosts every month. I've been using duiadns and duckdns for years.

  @TiagoLoss 

Your Update URL needs to be exactly in the format as described in the help section of your router.

Here's a screenshot for you:

As you can see, the URL you postes is fundamentally different.

In your case the URL needs to be:

Exactly like this.

Do not fill any variables or change anything else.

Can you try?

  @Hoamboy 

Duiadns or Duckdns have no username. Logins via token