iOS Release builds crashing after splash screen.

[Kumaresan]

Hi,

When I try to build the app for iOS release, the app installs on the device but crashes after the splash screen. The following is the log while debugging:
`2018-06-13 00:47:05.681 [fatal][tid:main] No bundle URL present.

Make sure you're running a packager server or have included a .jsbundle file in your application bundle.
2018-06-13 00:47:05.684068+0530 eltwallet[56900:3182567] No bundle URL present.

Make sure you're running a packager server or have included a .jsbundle file in your application bundle.
2018-06-13 00:47:05.729202+0530 eltwallet[56900:3182567] *** Terminating app due to uncaught exception 'RCTFatalException: No bundle URL present.

Make sure you're running a packager server or have included a .jsbundle file in your application bundle.', reason: 'No bundle URL present.

Make sure you're running a packager server or have ...'
*** First throw call stack:
(
0 CoreFoundation 0x0000000105f4012b __exceptionPreprocess + 171
1 libobjc.A.dylib 0x00000001043bff41 objc_exception_throw + 48
2 eltwallet 0x000000010366ceb5 RCTFormatError + 0
3 eltwallet 0x000000010365815a __28-[RCTCxxBridge handleError:]_block_invoke + 629
4 libdispatch.dylib 0x000000010ac862f7 _dispatch_call_block_and_release + 12
5 libdispatch.dylib 0x000000010ac8733d _dispatch_client_callout + 8
6 libdispatch.dylib 0x000000010ac925f9 _dispatch_main_queue_callback_4CF + 628
7 CoreFoundation 0x0000000105f02e39 CFRUNLOOP_IS_SERVICING_THE_MAIN_DISPATCH_QUEUE + 9
8 CoreFoundation 0x0000000105ec7462 __CFRunLoopRun + 2402
9 CoreFoundation 0x0000000105ec6889 CFRunLoopRunSpecific + 409
10 GraphicsServices 0x000000010cc4b9c6 GSEventRunModal + 62
11 UIKit 0x00000001089c65d6 UIApplicationMain + 159
12 eltwallet 0x0000000103642d6c main + 80
13 libdyld.dylib 0x000000010ad03d81 start + 1
)
libc++abi.dylib: terminating with uncaught exception of type NSException
(lldb) `

Are there any configurations which I need to set it right?

Thanks,
Kumar