DnD: JavaScript error when using keyboard to solve task

Description

This example: https://h5p.org/drag-and-drop#example=68888

Gives: TypeError: Cannot read property 'length' of undefined

Environment

None

Acceptance Criteria

No JavaScript error.

Assignee

Frode Petterson

Reporter

Pål Jørgensen

Labels

None

Funding

Accessibility

Code reviewer

Pål Jørgensen

Released

None

Time tracking

3h

Fix versions

Sprint

None

Affects versions

Priority

Medium
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