Just sharing what fixed mine. Perhaps trying googling how to release and renew on IP address on a tablet, or more specifically, your brand of tablet? I suspect there is a way to do that.
But only as an example--on my iPhone itself, if I go to WiFi, click on the information button next to the WiFi network I am connected to--in the properties, there is a "Renew Lease." That is, I think, the same thing as the /release /renew (someone more IT oriented on here might correct me?). So something like that might be the equivalent on a Tablet, if you can find it? Best of luck.
Btw, as an update--it is not a one-time fix in my case. I have to release and renew probably 75% of the time I try to use the Hotspot. This did not happen before my update to iOS 13. Not sure if it is an iOS 13 issue, or Windows issue, or what--but I have to do this often to make it work. But it does fix it every time I have the issue.