@<1590514584836378624:profile|AmiableSeaturtle81> ok, I think that your credentials from clearml.conf are actually working now. let's not change them.
Now let's try this simple code:

from clearml import Task
import numpy as np


if __name__ == "__main__":
    task = Task.init(task_name="test4", project_name="test4", output_uri="

")
    image = np.random.randint(0, 256, size=(500, 1000, 3), dtype=np.uint8)
    task.upload_artifact("image", image)

You should change the task_name and project_name from test just in case some object has been created previously