Hi @Cliqtrix-1 and welcome to the Forum
Let’s see if we can fix that together! Can you try to follow these steps?
- Access the following URL: https://asana.com/developers/api-reference/tasks
- Select "Explorer
- Authorize your account by clicking on the red banner.
- Then, select the “POST /tasks/:task/addProject” option above “Resource Description.”
From there, you will be able to enter your attributes in the fields below and, thanks to this page, you should be able to obtain the right query in order to post a task in a specific project (See screenshot below)
Hope this helps! Let me know if you have any follow-up question!