Impossible to move tasks from a tasklist through the API

Impossible to move tasks from a tasklist through the API

Impossible to move tasks from a tasklist through the API. It worked two days ago ... what happened?

I am using the following parameters according to your documentation:
- ZohoProjects.tasks.UPDATE
- tasklist_id

I get the following error:

"{
     "error": {
         "code": 6500,
         "message": "General Error"
     }
} "

What can I do??