We're using 15.3.0 react native. Shake.setNetworkRequestsEnabled(false) seem to help. Exception '-[__NSCFNumber length]: unrecognized selector sent to instance 0xaf0670999e32ba90' was thrown while invoking insertNetworkRequest on target RNShake with params ( { duration = 141; method = POST; requestBody = "{\"alias\":{\"userId\":\"u:Ch5nSmc3dndHMFlmRmg3dTl4K09kUk5jUnNENnFMZGI\"},\"credentials\":[{\"tokenCredential\":{\"token\":\"eyJraWQiOiJmOGM2Y2EyMi05NDA0LTQxYWItYTIwMC1hY2U3MTgxZWFjZWEiLCJhbGciOiJFUzI1NiJ9.eyJpc3MiOiJzdGVwIiwiaWF0IjoxNjcxMTM0NTAwLjM4LCJleHAiOjE2NzExMzgxMDAuNTIxMDAwMX0.GPJ8X5X_obEAzzBB_wL8N11zytr0aEwsq7AvzDUN_KKoZ7qdrwESIqnlvLPIvaPMp-CGWZbn7PElHGSgmRhhQA\"}}],\"sessionLifetimeMs\":\"86400000\",\"clientTimeMs\":\"1671134500397\",\"device\":{\"token\":\"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\",\"provider\":\"IOVATION\"}}"; requestHeaders = { Accept = "application/json, text/plain, */*"; "Content-Type" = "application/json"; "Step-App-Version" = "iOS/2.3.161-2823"; "Step-Bundle-Id" = "com.step.dev"; "Step-SDK-Version" = "1.546.0"; "X-Cloud-Trace-Context" = "f19ccdc7f2aa407b9510a6af69528fa8/0"; "X-Step-Original-Request-Timestamp" = 1671134500397; "X-Step-Sentry-Trace-Id" = 9444bc4e3c924177a6189a2dceada0c6; }; responseBody = "{\n \"refreshToken\": {\n \"value\": \"eyJraWQiOiJFVGluQlEwQ3ZfRDhRQk1ZUVlHbHBHWXpaR2dxU2c0R2FSN2twaTFVV0Y0IiwiYWxnIjoiRVMyNTYifQ.eyJjcyI6LTkwLCJzdWIiOiJ1OkNoNW5TbWMzZG5kSE1GbG1SbWczZFRsNEswOWtVazVqVW5ORU5uRk1aR0kiLCJzIjpmYWxzZSwiZCI6ZmFsc2UsImciOltdLCJpc3MiOiJzdGVwIiwiYWwiOjEsImV4cCI6MTY3MTIyMDkwMCwiaWF0IjoxNjcxMTM0NTAwLCJkaWQiOiJmZDpDaDFSYm1sdVNGSXhObVo0U0hwbFJWbExhbXgwVlVoT2FrTjFNVkJNTWcifQ._Z2TAaEjcR7WeoiTvCLqxe15XE5QWCveIV4IvDnj4lN3z1glM1BayJgwgy0rQliwYnHXXKvTLw6Z2pxlTihQhg\",\n \"lifetimeMs\": \"86400000\"\n },\n \"accessToken\": {\n \"value\": \"eyJraWQiOiJFVGluQlEwQ3ZfRDhRQk1ZUVlHbHBHWXpaR2dxU2c0R2FSN2twaTFVV0Y0IiwiYWxnIjoiRVMyNTYifQ.eyJzdWIiOiJ1OkNoNW5TbWMzZG5kSE1GbG1SbWczZFRsNEswOWtVazVqVW5ORU5uRk1aR0kiLCJkIjpmYWxzZSwiZyI6W10sImlzcyI6InN0ZXAiLCJhbCI6MSwidmUiOnRydWUsImNzIjotOTAsInMiOmZhbHNlLCJ2cCI6dHJ1ZSwiZXhwIjoxNjcxMTM1MTAwLCJpYXQiOjE2NzExMzQ1MDAsImRpZCI6ImZkOkNoMVJibWx1U0ZJeE5tWjRTSHBsUlZsTGFteDBWVWhPYWtOMU1WQk1NZyJ9.fncDQwElOxDeR8tub90m5GoYf9ZqSiF4KcafWhiK_qpwYhxnC5hiuIe-RdjXyD_-BjEBQE66d1-QF6NZ4B9m3A\",\n \"lifetimeMs\": \"600000\"\n },\n \"userId\": \"u:Ch5nSmc3dndHMFlmRmg3dTl4K09kUk5jUnNENnFMZGI\"\n}"; responseHeaders = { "alt-svc" = " h3=\":443\"; ma=2592000,h3-29=\":443\"; ma=2592000"; "cache-control" = " no-cache, no-store, must-revalidate"; "content-type" = " application/json"; date = " Thu, 15 Dec 2022 20:01:40 GMT"; expires = " 0"; pragma = " no-cache"; server = " istio-envoy"; "strict-transport-security" = " max-age=31536000; includeSubdomains;"; via = " 1.1 google"; "x-content-type-options" = " nosniff"; "x-envoy-upstream-service-time" = " 41"; "x-frame-options" = " deny"; "x-xss-protection" = " 1; mode=block"; }; statusCode = 200; timestamp = "2022-12-15T20:01:40.403000+0000"; url = "https://api.dev.step.com/auth/login"; } ) callstack: ( 0 CoreFoundation 0x0000000199749e94 5CDC5D9A-E506-3740-B64E-BB30867B4F1B + 40596 1 libobjc.A.dylib 0x0000000192a778d8 objc_exception_throw + 60 2 CoreFoundation 0x00000001998be84c 5CDC5D9A-E506-3740-B64E-BB30867B4F1B + 1566796 3 CoreFoundation 0x000000019975ffa0 5CDC5D9A-E506-3740-B64E-BB30867B4F1B + 130976 4 CoreFoundation 0x00000001997c8350 _CF_forwarding_prep_0 + 96 5 CFNetwork 0x000000019a8c7fd4 CFURLRequestSetHTTPRequestBody + 15172 6 CFNetwork 0x000000019a8c6668 CFURLRequestSetHTTPRequestBody + 8664 7 CFNetwork 0x000000019a8ffa08 CFURLRequestSetShouldStartSynchronously + 31144 8 CFNetwork 0x000000019a906470 CFURLRequestSetMultipleHTTPHeaderFields + 128 9 Shake 0x000000010a887f6c -[SHKNetworkRequestReporter reportRequestCompletedWithRNDict:] + 388 10 Shake 0x000000010a83bf90 +[SHKShake _reportRequestCompleted:] + 84 11 react_native_shake 0x0000000107aa46f8 -[RNShake insertRNNetworkRequest:] + 108 12 react_native_shake 0x0000000107aa28a8 -[RNShake insertNetworkRequest:] + 96 13 CoreFoundation 0x00000001997b4704 5CDC5D9A-E506-3740-B64E-BB30867B4F1B + 476932 14 CoreFoundation 0x0000000199760b6c 5CDC5D9A-E506-3740-B64E-BB30867B4F1B + 133996 15 CoreFoundation 0x0000000199760584 5CDC5D9A-E506-3740-B64E-BB30867B4F1B + 132484 16 React 0x00000001072308c4 -[RCTModuleMethod invokeWithBridge:module:arguments:] + 1744 17 React 0x0000000107234214 _ZN8facebook5reactL11invokeInnerEP9RCTBridgeP13RCTModuleDatajRKN5folly7dynamicEiN12_GLOBAL__N_117SchedulingContextE + 1108 18 React 0x0000000107233be4 _ZZN8facebook5react15RCTNativeModule6invokeEjON5folly7dynamicEiENK3$_0clEv + 144 19 React 0x0000000107233b48 ___ZN8facebook5react15RCTNativeModule6invokeEjON5folly7dynamicEi_block_invoke + 28 20 libdispatch.dylib 0x000000010a6705a8 _dispatch_call_block_and_release + 32 21 libdispatch.dylib 0x000000010a67205c _dispatch_client_callout + 20 22 libdispatch.dylib 0x000000010a682810 _dispatch_main_queue_drain + 1196 23 libdispatch.dylib 0x000000010a682354 _dispatch_main_queue_callback_4CF + 44 24 CoreFoundation 0x00000001997da6f8 5CDC5D9A-E506-3740-B64E-BB30867B4F1B + 632568 25 CoreFoundation 0x00000001997bc058 5CDC5D9A-E506-3740-B64E-BB30867B4F1B + 507992 26 CoreFoundation 0x00000001997c0ed4 CFRunLoopRunSpecific + 612 27 GraphicsServices 0x00000001d2ac2368 GSEventRunModal + 164 28 UIKitCore 0x000000019bc9f3d0 179501B6-0FC2-344A-B969-B4E3961EBE10 + 3810256 29 UIKitCore 0x000000019bc9f034 UIApplicationMain + 340 30 Step Beta 0x000000010243742c main + 64 31 dyld 0x00000001b7e2c960 CB3FF411-4762-34D2-86A4-ECA13F9FB6C3 + 88416 ) RCTFatal facebook::react::invokeInner(RCTBridge*, RCTModuleData*, unsigned int, folly::dynamic const&, int, (anonymous namespace)::SchedulingContext) facebook::react::RCTNativeModule::invoke(unsigned int, folly::dynamic&&, int)::$_0::operator()() const invocation function for block in facebook::react::RCTNativeModule::invoke(unsigned int, folly::dynamic&&, int) _dispatch_call_block_and_release _dispatch_client_callout _dispatch_main_queue_drain _dispatch_main_queue_callback_4CF 5CDC5D9A-E506-3740-B64E-BB30867B4F1B 5CDC5D9A-E506-3740-B64E-BB30867B4F1B CFRunLoopRunSpecific GSEventRunModal 179501B6-0FC2-344A-B969-B4E3961EBE10 UIApplicationMain main CB3FF411-4762-34D2-86A4-ECA13F9FB6C