Where we see the error logs (for the contributors) , for the debugging purpose

[DHRUV_PATIDAR]

Where i can see the error logs ?

in the image the server is running , but i am not seeing the error logs

Let's say i am testing the app and it crashes , then where i have to check for the logs ?

[ewpatton]

You need to use adb to access any logs related to the code running on the Android device. Specifically adb logcat will read the logs from the device.