app crashes immediately when opened, working fine in simulator

Hi,

i was testing my app using simulator and everything is working fine, but as soon i tried to archive it and installing directly on my phone the app crashed. I tried also using Testflight and it happened the same. Below you can find the full error log that i am getting, can you help me understand the problem?

this is the error log: https://www.dropbox.com/s/yu16v0ue5sqhfgu/error%20log.rtf?dl=0

Consider the backtrace of your crashing thread:

Thread 7 Crashed:: com.facebook.react.JavaScript
0   libsystem_kernel.dylib  … __pthread_kill + 8
1   libsystem_pthread.dylib … pthread_kill + 288
2   libsystem_c.dylib       … abort + 180
3   libsystem_c.dylib       … __assert_rtn + 272
4   developerszone          … 0x100a50000 + 790368
5   developerszone          … 0x100a50000 + 825676
6   developerszone          … 0x100a50000 + 2226968
7   hermes                  … 0x1012e0000 + 78300
8   hermes                  … 0x1012e0000 + 159792
9   hermes                  … 0x1012e0000 + 287328
10  hermes                  … 0x1012e0000 + 284444
11  hermes                  … 0x1012e0000 + 566852
12  hermes                  … 0x1012e0000 + 26000
13  hermes                  … facebook::hermes::HermesRuntime::evaluateJavaScriptWithSourceMap(std::__1::shared_ptr<facebook::jsi::Buffer const> const&, std::__1::shared_ptr<facebook::jsi::Buffer const> const&, std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char>> const&) + 88
14  hermes                  … 0x1012e0000 + 30456
15  developerszone          … 0x100a50000 + 2216184
16  developerszone          … 0x100a50000 + 2410136
17  developerszone          … 0x100a50000 + 2034448
18  developerszone          … 0x100a50000 + 2038116
19  developerszone          … 0x100a50000 + 1362924
20  developerszone          … 0x100a50000 + 1411692
21  developerszone          … 0x100a50000 + 1411140
22  CoreFoundation          … __CFRUNLOOP_IS_CALLING_OUT_TO_A_BLOCK__ + 28
23  CoreFoundation          … __CFRunLoopDoBlocks + 364
24  CoreFoundation          … __CFRunLoopRun + 2432
25  CoreFoundation          … CFRunLoopRunSpecific + 612
26  developerszone          … 0x100a50000 + 1321268
27  Foundation              … __NSThread__start__ + 716
28  libsystem_pthread.dylib … _pthread_start + 148
29  libsystem_pthread.dylib … thread_start + 8

Frame 4 has tripped an assert that’s crashed the process. It’s hard to say why because very few of these frames are symbolicated. You may be able to symbolicate them using the techniques described in Adding Identifiable Symbol Names to a Crash Report but, even if you do, there’s no guarantee that’ll help because you’re deep in your third-party language runtime. So, if symbolication doesn’t help, I recommend that you escalate this via the support chanel for that runtime.

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Quinn “The Eskimo!” @ Developer Technical Support @ Apple
let myEmail = "eskimo" + "1" + "@" + "apple.com"

app crashes immediately when opened, working fine in simulator
 
 
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