Network Response Time Out Error (create-react-native-app) (expo)

Question

I am trying to run create-react-native-app on expo app in android.

Firstly ,I created the project by writing command

create-react-native-app t

Answer 1

First of all, disable the unused network connection. In my case it was VirtualBox. Maybe it's using the same port. I am not sure about that. after disabling the unused connections then restart the packager. if you used npm then type

npm start

Answer 2

This error beaus your port it is not open just check port is open or not for ubuntu you can check using the following way

sudo ufw status verbose

check 19000 port open then you need it then run following command if port not open

 sudo ufw allow 19000/tcp

for other port runs following command

sudo ufw allow 19001/tcp

because http port not you are getting erro. above step solve your problem similar for mac and windows check firewall setting once

Answer 3

If you have tried everything the other answers suggest and it still does not work, please also check that your computer and your phone are connected to the same WIFI network. For me this is what wasted an hour.

Answer 4

I had the same issue after npm start script on windows environment. Putting mobile on the same network as my Windows development environment was solved issue.

Answer 5

Change your network settings:

1. Network and Internet setting
2. Status
3. Change connection properties
4. Checked public option

Answer 6

This is due to not open port from your machine.

Linux (Ubuntu)

In Ubuntu Run In terminal

sudo ufw status verbose To view open port if you cannot found 19000 port open then you need to open port using

sudo ufw allow 19000/tcp

and then again run

sudo ufw allow 19001/tcp

to serve http for react native i solve this problem in my ubuntu using this method. I hope this will help you.

Windows

To open a port in the Windows firewall for TCP access On the Start menu, click Run, type WF.msc, and then click OK.

In the Windows Firewall with Advanced Security, in the left pane, right-click Inbound Rules, and then click New Rule in the action pane.

In the Rule Type dialog box, select Port, and then click Next.

In the Protocol and Ports dialog box, select TCP. Select Specific local ports, and then type the port number of the instance of the React port, such as 19000 for the default instance. Click Next.

In the Action dialog box, select Allow the connection, and then click Next.

In the Profile dialog box, select any profiles that describe the computer connection environment when you want to connect to the Database Engine, and then click Next.

In the Name dialog box, type a name and description for this rule, and then click Finish.

Similarly you can open port 19001 too.