App crashes on iOS

Hi,
my app runs fine in Expo Client on Android, but when I try to run it on iOS it crashes after displaying the splash screen. The logs that I get are the following, which doesn’t say much:

Incident Identifier: F07C26F9-6959-4D5E-9A00-E95BC3F1CDE7
CrashReporter Key:   6cf588b09bf414c0ca8e856a03a6f59333f25070
Hardware Model:      iPhone8,2
Process:             Exponent [339]
Path:                /private/var/containers/Bundle/Application/FE249A73-C1B4-4475-B52D-350948A9C659/Exponent.app/Exponent
Identifier:          host.exp.Exponent
Version:             2.14.1.107621 (2.14.1)
AppStoreTools:       11B48b
AppVariant:          1:iPhone8,2:13
Code Type:           ARM-64 (Native)
Role:                Foreground
Parent Process:      launchd [1]
Coalition:           host.exp.Exponent [504]


Date/Time:           2020-02-24 18:40:54.3806 +0800
Launch Time:         2020-02-24 18:40:42.2310 +0800
OS Version:          iPhone OS 13.2.3 (17B111)
Release Type:        User
Baseband Version:    7.11.01
Report Version:      104

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

Last Exception Backtrace:
0   CoreFoundation                	0x19102d80c __exceptionPreprocess + 220
1   libobjc.A.dylib               	0x190d55fa4 objc_exception_throw + 55
2   CoreFoundation                	0x191083350 _CFThrowFormattedException + 111
3   CoreFoundation                	0x19108c8d4 -[__NSDictionaryM setObject:forKeyedSubscript:].cold.1 + 47
4   CoreFoundation                	0x190f0e790 -[__NSDictionaryM setObject:forKeyedSubscript:] + 975
5   Exponent                      	0x1029c4a58 0x102920000 + 674392
6   Exponent                      	0x10293f434 0x102920000 + 128052
7   CoreFoundation                	0x190f8904c __CFNOTIFICATIONCENTER_IS_CALLING_OUT_TO_AN_OBSERVER__ + 19
8   CoreFoundation                	0x190f89094 ___CFXRegistrationPost1_block_invoke + 63
9   CoreFoundation                	0x190f883f4 _CFXRegistrationPost1 + 367
10  CoreFoundation                	0x190f880ac ___CFXNotificationPost_block_invoke + 103
11  CoreFoundation                	0x190f0436c -[_CFXNotificationRegistrar find:object:observer:enumerator:] + 1415
12  CoreFoundation                	0x190f879fc _CFXNotificationPost + 1243
13  Foundation                    	0x1912e4168 -[NSNotificationCenter postNotificationName:object:userInfo:] + 59
14  Exponent                      	0x103529258 0x102920000 + 12620376
15  libdispatch.dylib             	0x190cfa610 _dispatch_call_block_and_release + 23
16  libdispatch.dylib             	0x190cfb184 _dispatch_client_callout + 15
17  libdispatch.dylib             	0x190cad190 _dispatch_main_queue_callback_4CF$VARIANT$mp + 1043
18  CoreFoundation                	0x190fab3a8 __CFRUNLOOP_IS_SERVICING_THE_MAIN_DISPATCH_QUEUE__ + 11
19  CoreFoundation                	0x190fa639c __CFRunLoopRun + 2003
20  CoreFoundation                	0x190fa58a0 CFRunLoopRunSpecific + 463
21  GraphicsServices              	0x19aefd328 GSEventRunModal + 103
22  UIKitCore                     	0x195096740 UIApplicationMain + 1935
23  Exponent                      	0x1029e11b8 0x102920000 + 790968
24  libdyld.dylib                 	0x190e30360 start + 3

Any ideas of what may be happening? Thanks!