Server error when creating a new task

[ArturDev42]

Description

When creating a new task on the test server, the following error is thrown:

OpenMLServerError: Unexpected server error when calling [https://test.openml.org/api/v1/xml/task/.](https://test.openml.org/api/v1/xml/task/) 
Please contact the developers! Status code: 500

This seems to some kind of bug, because in the past I was able to sucessfully create new tasks.

Steps/Code to Reproduce

I am trying to create a new task as follows:

test_task = openml.tasks.create_task(
        task_type=TaskType.SUPERVISED_CLASSIFICATION,
        dataset_id=128,
        target_name="class",
        evaluation_measure="predictive_accuracy",
        estimation_procedure_id=3,
    )
test_task.publish()

Versions

macOS-13.0-arm64-arm-64bit
Python 3.11.2 
NumPy 1.24.2
SciPy 1.10.1
Scikit-Learn 1.2.2
OpenML 0.13.1

[mfeurer]

Unfortunately, it is not possible to upload things to the test server at the moment. Therefore, I just transferred the issue to the main OpenML repository.