Unable to upload new images in a created Visual Question Answering task

**Describe the bug**
Unable to upload a new image in a created VQA task, the following appears when uploading an image:

**[0daf5e7a-bba8-4a2a-a6b2-a2d2ea423ab8] Validation error (Failed to parse input file upload/20/b95b6c59-00005.jpg: [ErrorDetail(string='Your label config has more than one data key and direct file upload supports only one data key. To import data with multiple data keys, use a JSON or CSV file.', code='invalid')])**

What do I have to do to fix it?

**To Reproduce**
Steps to reproduce the behavior:
1. Go to '...'
2. Click on '....'
3. Scroll down to '....'
4. See error

**Expected behavior**
A clear and concise description of what you expected to happen.

**Screenshots**
If applicable, add screenshots to help explain your problem.

**Environment (please complete the following information):**
- OS: [e.g. iOS]
- Label Studio Version [e.g. 0.8.0]

**Additional context**
Add any other context about the problem here.