In my case just go "setting" "data usage" and just drag the warning line (the line in the chart) to max that is 100gig. Since there is no "turn off data saver" button in my data usage menu. And yes my mobile data were on.

In my case just go "setting" "data usage" and just drag the warning line (the line in the chart) to max that is 100gig. Since there is no turn off data saver. button in my data usage menu. And yes my mobile data were on.