React-Native app hangs on splash on iOS, but on on Android works just fine

Question

I have the app that uses React-Native 0.62.3 and it does not run on iOS. It launches, receives the bundle from metro and does nothing but keeps showing the splash screen. Here's the run log:

flipper: FlipperClient::addPlugin Inspector
flipper: FlipperClient::addPlugin Preferences
flipper: FlipperClient::addPlugin React
flipper: FlipperClient::addPlugin Network
2020-10-15 15:30:32.116261+0300 fastboss_mobile_rn[60669:792251] [plugin] AddInstanceForFactory: No factory registered for id <CFUUID 0x600000aebe00> F8BB1C28-BAE8-11D6-9C31-00039315CD46
2020-10-15 15:30:32.326978+0300 fastboss_mobile_rn[60669:793032] [] nw_protocol_get_quic_image_block_invoke dlopen libquic failed
2020-10-15 15:30:32.410529+0300 fastboss_mobile_rn[60669:792251] [native] Running application fastboss_mobile_rn ({
    initialProps =     {
    };
    rootTag = 1;
})
2020-10-15 15:30:39.443156+0300 fastboss_mobile_rn[60669:793034] [connection] nw_socket_handle_socket_event [C6.1:1] Socket SO_ERROR [61: Connection refused]
2020-10-15 15:30:39.450465+0300 fastboss_mobile_rn[60669:793034] [connection] nw_socket_handle_socket_event [C6.2:1] Socket SO_ERROR [61: Connection refused]
2020-10-15 15:30:39.452317+0300 fastboss_mobile_rn[60669:793033] [connection] nw_connection_get_connected_socket [C6] Client called nw_connection_get_connected_socket on unconnected nw_connection
2020-10-15 15:30:39.452482+0300 fastboss_mobile_rn[60669:793033] TCP Conn 0x600003cf4a50 Failed : error 0:61 [61]
2020-10-15 15:30:39.975074+0300 fastboss_mobile_rn[60669:793119] [javascript] Require cycle: components/Dashboard/content/index.js -> components/Dashboard/content/Customers.js -> components/Dashboard/content/index.js

Require cycles are allowed, but can result in uninitialized values. Consider refactoring to remove the need for a cycle.
2020-10-15 15:30:39.980483+0300 fastboss_mobile_rn[60669:793119] [javascript] Require cycle: components/Dashboard/index.js -> components/Dashboard/Menu.js -> components/Dashboard/index.js

Require cycles are allowed, but can result in uninitialized values. Consider refactoring to remove the need for a cycle.
2020-10-15 15:30:39.986365+0300 fastboss_mobile_rn[60669:793119] [javascript] Require cycle: components/index.js -> components/Dashboard/index.js -> components/index.js

Require cycles are allowed, but can result in uninitialized values. Consider refactoring to remove the need for a cycle.
2020-10-15 15:30:40.029406+0300 fastboss_mobile_rn[60669:793119] [javascript] Running "fastboss_mobile_rn" with {"rootTag":1,"initialProps":{}}
2020-10-15 15:30:40.166056+0300 fastboss_mobile_rn[60669:793284] [native] Manifest does not exist - creating a new one.

(null)
2020-10-15 15:30:40.236534+0300 fastboss_mobile_rn[60669:793119] [javascript] 'token on start up:', null

I've tried to google about nw_socket_handle_socket_event [C6.1:1] Socket SO_ERROR [61: Connection refused], but for me it seems like all the reasults are about this line being looped, but in my case it appears only 2 times.

Also the last log string is console.log() from the app, so i guess it kinda tries to work, i don't know..

I'd be pretty happy if you could tell me what is possibly wrong, because I ran out of ideas what can I do about it

xcode v12.0.1 ios 14 simulator

If I can provide any useful for you info, let me know

Answer 1

I ran into this issue and noticed it was because my iPhone and my Mac running XCode were on different WiFi networks. Verify that both devices are on the same network.