I would like to claim a Task in WorldServer to work on it, but it is already claimed. If I try to claim it, I get an error
None of the selected tasks can be claimed. See table below for details on each task Task is claimed by another user.
If you are an assignee of the Task, click on Unclaim to unclaim it from the current claimant user. Once you have unclaimed the Task, you will be able to claim it.
Note: in order to be able to unclaim a Task you need to be an assignee of the Task. If you are an assignee but you still cannot unclaim the Task, your User Type probably does not include permission to unlock files. Please refer to this article for more details:
Adding the missing permission to your User Type will allow you to unclaim a Task. If changing the User Type is not possible, ask the claimant of the Task to unclaim it or ask a user who has the needed permissions to unclaim it for you.