Error writing response

Hello. I’m using Grafana 6.7.3. Datasource: MySQL. OS: Windows.

I’m new at using grafana , i need it to monitor some industrial variables. The last days grafana logs out alone, and sends the following messages:

Error writing to response [0m="write tcp [::1]:8080–>[::1]58189: wsasend: Se ha anulado una conexión establecida por el software con su equipo host.

So I decided to migrate to Grafana 7, but I got the same error. Thank you.