When I tried assigning the task and enter the name or e mail id on the assigned to text box it is not showing up the assignee name. or gives an error not found.
Is there any particular file on which you see this issue? I personally tested this with an admin, power user and standard user and the task feature worked fine for all the 3 users.
I suggest you file a support request at firstname.lastname@example.org and let our support technician take a look at this issue.
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