Create indexer - Can anyone help me please?

Hi everyone,

I'm trying to Create a Custom Skill for Azure AI Search, following the Labs below.

https://github.com/MicrosoftLearning/mslearn-knowledge-mining/blob/main/Instructions/Labs/01-azure-search.md

When I try to creat an indexer with "./create-search" command on PowerShell of Visual Studio Code, the error is returned (I'm using C#);

{"error":{"code":"","message":"This indexer refers to a skillset 'margies-custom-skillset' that doesn't exist"}}

Why does this happen? Where is the skillset 'margies-custom-skillset' stored?? Is there any hint to get this though? Access Keys (service, admin, storge) are correctly entered.