Apple Store We were unable to review your app as it crashed on launch

Question

My Xamarin iOS App, Works great in the simulator, but when i publish to the apple store i get this error:

Guideline 2.1 - Performance - App Completeness

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

Heres the error log:

{"app_name":"ProyectoAngela.Prism.iOS","timestamp":"2022-01-14 10:33:37.00 -0800","app_version":"1.3","slice_uuid":"0725ebef-24d0-3dd4-aba2-bd0283b254a8","adam_id":"1604093951","build_version":"1.3","platform":2,"bundleID":"com.mxxx.xxxx","share_with_app_devs":0,"is_first_party":0,"bug_type":"309","os_version":"iPhone OS 15.2 (19C56)","incident_id":"C23408FA-A088-4955-9454-2BD6CA8A371E","name":"ProyectoAngela.Prism.iOS"}
{
  "uptime" : 2400000,
  "procLaunch" : "2022-01-14 10:33:34.8287 -0800",
  "procRole" : "Foreground",
  "version" : 2,
  "userID" : 501,
  "deployVersion" : 210,
  "modelCode" : "iPad7,5",
  "procStartAbsTime" : 59878077029641,
  "coalitionID" : 5657,
  "osVersion" : {
    "isEmbedded" : true,
    "train" : "iPhone OS 15.2",
    "releaseType" : "User",
    "build" : "19C56"
  },
  "captureTime" : "2022-01-14 10:33:36.5764 -0800",
  "incident" : "C23408FA-A088-4955-9454-2BD6CA8A371E",
  "bug_type" : "309",
  "pid" : 24812,
  "procExitAbsTime" : 59878118842372,
  "cpuType" : "ARM-64",
  "procName" : "ProyectoAngela.Prism.iOS",
  "procPath" : "\/private\/var\/containers\/Bundle\/Application\/3F629218-B618-43E2-A456-6AF0F4B6132B\/ProyectoAngela.Prism.iOS.app\/ProyectoAngela.Prism.iOS",
  "bundleInfo" : {"CFBundleShortVersionString":"1.3","CFBundleVersion":"1.3","CFBundleIdentifier":"com.mxxx.xxxx","DTAppStoreToolsBuild":"13C90b"},
  "storeInfo" : {"itemID":"1604093951","deviceIdentifierForVendor":"F13E8B85-5D9C-4C8E-885D-4550BE2D0EB1","thirdParty":true,"softwareVersionExternalIdentifier":"43806246"},
  "parentProc" : "launchd",
  "parentPid" : 1,
  "coalitionName" : "com.mxxx.xxxx",
  "crashReporterKey" : "36c14055bb17c6d0db3f456869338332b769d45e",
  "isCorpse" : 1,
  "exception" : {"codes":"0x0000000000000000, 0x0000000000000000","rawCodes":[0,0],"type":"EXC_CRASH","signal":"SIGABRT"},
  "ktriageinfo" : "VM - Fault hit memory shortage\nVM - Fault hit memory shortage\nVM - Fault hit memory shortage\nVM - Fault hit memory shortage\n",
  "asi" : {"libsystem_c.dylib":["abort() called"]},
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  "faultingThread" : 0,
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Answer 1

I think you should always test your app on a physical device before submitting your app to the App store.

By doing so you can correct bugs or missing permissions early.