Preconditions:

• Added CT with image asset field type

Steps to reproduce

1. Log in to back office.
2. Go to Content / Content structure.
3. Select 'Ibexa Platform' content.
4. Switch to 'Sub-items' tab.
5. Click on 'Upload' button.
6. Select a file with not allowed extension e.g. .html

Actual result:

An error 400 bad request occurs.

{_fieldTypeId: 192, errors: [{type: "id", message: "A valid image file is required."}]}errors: [{type: "id", message: "A valid image file is required."}]0: {type: "id", message: "A valid image file is required."}message: "A valid image file is required."type: "id"_fieldTypeId: 192

Expected result:

No exception occurs, User receives information that uploaded file extension is not allowed for such CT.