Dataset on Service not refreshing

Hello, 

I am having a problem refreshing a dataset on Power BI Service. My dataset is just a very small Sharepoint List that has less than 200 rows. On Desktop, it takes 20 seconds to refresh, but on Service I have been waiting now for over 40 min and it is not refreshing. Yesterday it was working well on service, but today I tried several times and I end up waiting a very long time with no success. Any idea what could be the reason?