JS server not recognized, continuing with build

Question

Environment

Windows 10

Npm 5.5.1

react-native-cli 2.0.1

react-native 0.50.3

Genymotion Google Nexus 7 - 6.0.0 API 23

Answer 1

Try to turn off a local server program like MAMP, WAMP, OpenServer e.t.c. They can use the 8081 port.