System Error - Looker Studio

looker studio - System Error

I have reloaded my looker report for the whole morning, but its data are not showing blank boxes with the loading bar sign above the page.  I have tried clearing my cache, reloading the website, restating the browsers, and restarting the computer, but nothing has helped, and now I am still unable to access the data, May I ask how I can troubleshoot this? 

5 3 258