Ream time dashboard streaming data

 Hello , 
I have created a new push dataset by using python script . top of the dataset created a report .

then created a dashboard on top the report.. but when i refresh the dashboard i am encountering with below  error message.. do you have any idea ?

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Couldn't load the data for this visual
The artifact belongs to a user that is not in the system and for which we cannot execute the query .
please try again later or contact support ......

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