All devices are currently on same wifi network.
My app is connected to local server using port 9443. Server (on same wifi network) IP address “192.168.1.15”
On my esp i have written command blynk.config(auth, “192.168.1.15”, 8080) and auth is authorisation token I have genereated from the app.
EDIT
My phone is able to connect to the server as I am able to login to the blynk app. I believe that the ESP is not able to connect to the local server and that is why it is showing offline. So there must a problem either with the auth code or the blynk.config command. I have checked the auth code again. So that means there has to be a problem with blynk.config command more specifically IP Address or the port 8080. IP address is correct so essentially the problem is with 8080, right?