app crashed on launch.

[emin_d_]

Hello to all

I created a simple application that uses the room and saves the data in the localStorage in json.

I have tested and debugged dozens of times both on Androi d devices on an iPad mini, I never received any kind of errors.

I downloaded the app on itunes and my code was respito from apple.
This is the message I received:

Performance - 2.1

We were unable to review your app as it crashed on launch. We have attached detailed crash logs to help troubleshoot this issue.

Next Steps

Please revise your app and test it on a device while connected to an IPv6 network (all apps must support IPv6) to ensure it will launch without crashing.

Resources

For additional information about supporting IPv6 Networks, please refer to Supporting IPv6 DNS64/NAT64 Networks and Supporting IPv6-only Networks.

For a networking overview, please see About Networking.

For information on how to symbolicate and read a crash log, please see Tech Note TN2151 Understanding and Analyzing iPhone OS Application Crash Reports.

If you have difficulty reproducing this issue, please try testing the workflow described in Testing Workflow with Xcode's Archive feature.

If you have code-level questions after utilizing the above resources, you may wish to consult with Apple Developer Technical Support. When the DTS engineer follows up with you, please be ready to provide:
- complete details of your rejection issue(s)
- screenshots
- steps to reproduce the issue(s)
- symbolicated crash logs - if your issue results in a crash log

This is the log posted by apple:

Exception Type:  EXC_CRASH (SIGABRT)
Exception Codes: 0x0000000000000000, 0x0000000000000000
Exception Note:  EXC_CORPSE_NOTIFY
Triggered by Thread:  0

Filtered syslog:
None found

Last Exception Backtrace:
(0x18230adb0 0x18196ff80 0x182311c4c 0x18230ebec 0x18220cc5c 0x187935ee0 0x187939b0c 0x1000731ec 0x100072fb0 0x1874608ec 0x187460844 0x187d4f450 0x1877bcd90 0x1877e2af4 0x1877e5890 0x18755b3cc 0x182cd2658 0x1822c1794 0x1822c1438 0x1822beb4c 0x1821e8c50 0x183ad0088 0x1874ca088 0x10006c4cc 0x181d868b8)

Global Trace Buffer (reverse chronological seconds):
0.498336     AppleJPEG                     0x0000000183d6aa88 [0x135cb7c00] Releasing session
0.498545     AppleJPEG                     0x0000000183d6aa88 [0x135cb5000] Releasing session
0.498545     AppleJPEG                     0x0000000183d6aa88 [0x135cb2400] Releasing session
0.498600     AppleJPEG                     0x0000000183d6aa88 [0x136b5d600] Releasing session
0.498714     AppleJPEG                     0x0000000183d6aa88 [0x135c84a00] Releasing session
0.498714     AppleJPEG                     0x0000000183d6aa88 [0x135c81e00] Releasing session
0.498850     AppleJPEG                     0x0000000183d6aa88 [0x136b5aa00] Releasing session
0.498850     AppleJPEG                     0x0000000183d6aa88 [0x136b57e00] Releasing session
0.499003     AppleJPEG                     0x0000000183d6aa88 [0x135c7e200] Releasing session
0.499003     AppleJPEG                     0x0000000183d6aa88 [0x135c7a600] Releasing session
0.499877     AppleJPEG                     0x0000000183d6aa88 [0x136b55200] Releasing session
0.499877     AppleJPEG                     0x0000000183d6aa88 [0x136128e00] Releasing session
0.499877     AppleJPEG                     0x0000000183d6aa88 [0x135e8f000] Releasing session
0.499877     AppleJPEG                     0x0000000183d6aa88 [0x136b52600] Releasing session
0.499877     AppleJPEG                     0x0000000183d6aa88 [0x136125200] Releasing session
0.499877     AppleJPEG                     0x0000000183d6aa88 [0x136121600] Releasing session
0.499878     AppleJPEG                     0x0000000183d6aa88 [0x135c9da00] Releasing session
0.499878     AppleJPEG                     0x0000000183d6aa88 [0x135c99e00] Releasing session
0.499878     AppleJPEG                     0x0000000183d6aa88 [0x136b0c200] Releasing session
0.499878     AppleJPEG                     0x0000000183d6aa88 [0x135c96200] Releasing session
0.499878     AppleJPEG                     0x0000000183d6aa88 [0x13611da00] Releasing session
0.499878     AppleJPEG                     0x0000000183d6aa88 [0x136b09600] Releasing session
0.499878     AppleJPEG                     0x0000000183d6aa88 [0x135c92600] Releasing session
0.499878     AppleJPEG                     0x0000000183d6aa88 [0x135e89e00] Releasing session
0.499878     AppleJPEG                     0x0000000183d6aa88 [0x136bae000] Releasing session
0.499878     AppleJPEG                     0x0000000183d6aa88 [0x136baa400] Releasing session
0.499878     AppleJPEG                     0x0000000183d6aa88 [0x135ccda00] Releasing session

Thread 0 name:  Dispatch queue: com.apple.main-thread
Thread 0 Crashed:
0   libsystem_kernel.dylib            0x0000000181ea411c 0x181e88000 + 114972
1   libsystem_pthread.dylib           0x0000000181f70ef8 0x181f6c000 + 20216
2   libsystem_c.dylib                 0x0000000181e15dc8 0x181db4000 + 400840
3   libc++abi.dylib                   0x00000001819493f4 0x181948000 + 5108
4   libc++abi.dylib                   0x0000000181965e98 0x181948000 + 122520
5   libobjc.A.dylib                   0x0000000181970248 0x181968000 + 33352
6   libc++abi.dylib                   0x0000000181962f44 0x181948000 + 110404
7   libc++abi.dylib                   0x0000000181962b10 0x181948000 + 109328
8   libobjc.A.dylib                   0x0000000181970120 0x181968000 + 33056
9   CoreFoundation                    0x00000001821e8cf8 0x1821e0000 + 36088
10  GraphicsServices                  0x0000000183ad0088 0x183ac4000 + 49288
11  UIKit                             0x00000001874ca088 0x18744c000 + 516232
12  FlippyCard                        0x000000010006c4cc 0x100068000 + 17612
13  libdyld.dylib                     0x0000000181d868b8 0x181d84000 + 10424

I compiled binary code simply in the BUILD tab.

I've never developed for iOS, on Android and I do not know what it means to this error, how do I fix this?