Having issue with Level course

[kazman100]

Describe the problem/error/question

I’m working through the level 1 tutorial at Getting data from the data warehouse | n8n Docs and I created the http request node and double checked the credentials, I’m getting an error that say’s This webhook is not registered for GET requests. Did you mean to make a POST request?

This is the webhook URL I am using is

https://internal.users.n8n.cloud/webhook/course-level-1

I’ve tried recreating the node and changing the request to a POST request neither option works, when using a POST request the error changes to

Your message is incorrectly formatted.

What is the error message (if any)?

The resource you are requesting could not be found

This webhook is not registered for GET requests. Did you mean to make a POST request?

Please share your workflow

1 HTTP Request node

Share the output returned by the last node

Information on your n8n setup

• Using hosted N8N, registered 2 days ago

[ResuelveconIA]

Hello my friend, how are you? I hope you don’t get frustrated with the exercises from class 1 of n8n. First of all, if my answer was helpful, I hope you mark it as valid! Thanks.

You need to read the questions and the data that n8n sends us carefully — sometimes they include an extra space. For example, in “authentication header value” (:"_“WFb the underscore is actually a space, so pay close attention to that. Also in the “unique ID”: f”_"24 there’s a space as well.

It took me some time to realize this! I hope this helps you and makes it easier for you to complete the course.

Big hug!

[atoupro54]

Hello,

I got the same kind of error following ‘the level 1 tutorial Getting data from the data warehouse | n8n Docs at the step that send the message to discord with the url https://internal.users.n8n.cloud/webhook/course-level-1

see screen copies hereafter.

Thank you for your help

[atoupro54]

Re,

I found out the error :

In the Discord message, i was calling:

{{ $('HTTP Request').params["headerParameters"]["parameters"][0]["value"] }}

However, my node was actually named “HTTP Request Get data from n8n Warehouse” (as I renamed it).
In n8n, the expression $('Node Name') must exactly match the node label.
That’s why I’am getting the “Referenced node doesn’t exist” error.

Solution 1 : modify the js code useing the exact name of the node

{{ $(‘HTTP Request Get data from n8n Warehouse’).parameter(‘headerParameters.parameters[0].value’) }}

Solution 2 : rename the node ‘HTTP Request’ .