Someone assigned me a task,but i can not receive the notification

1

i was assigned a task ,but i can not receive the notification,
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i have nothing about my task infomation unless i go to the to-do list,
what is wrong,do i miss some setup?

2

Go to Notification Settings and check if the “Assignment” checkbox has been checked.

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4

thanks very much .
by the way ,is there any method to set this for all the users when i access as Administrator?

5

i tried the method, I used Administrator assign a task to another user—wangs, wangs does received the task,but wangs does not get an notification here:

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6

any updates on this?