React native android failed to load JS bundle

Environment:
OS: macOS Sierra 10.12.6
Node: 8.3.0
Yarn: 0.27.5
npm: 5.5.1
Watchman: 4.9.0
Xcode: Xcode 9.2 Build version 9C40b
Android Studio: 3.0 AI-171.4443003

Packages: (wanted = > installed)
react: ^ 16.3.0-alpha.0 = > 16.3.1
react-native: 0.55.0 = > 0.55.0

< H2 > Steps to Reproduce < / H2 >

1:react-native init Test
2:cd Test
3:react-native run-andorid
use android virtual genymotion google nexus 6p-7.1.0

< H2 > Expected Behavior < / H2 >

run normal like ios is ok.

< H2 > Actual Behavior < / H2 >

if release is ok.

Unable to load script from assets "index.android.bundle".make sure you bundle is packaged correctly.....

Javascript node.js react-native

Mar.07,2021

check whether the following IP is correct.

because of watchman
the
command is as follows
rm-rf / usr/local/var/run/watchman/root-state
reference: https://github.com/facebook/r.

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