User Locked Task

If a user has indeed locked a task is to ask the user in question to reschedule the task, it can be for the same day as that won't have an impact on the result of this.
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If you then refresh the task list and are able to action the task then there are no further issues, however if you cannot do that or if this re-occurs multiple times then please raise a new case online and reference the title of this article.