Crashed: OneSignal.OSOperationRepo

[Parthzobi]

Hey team,
Could you please check I'm getting a few crashes on Onesignal SDK.

"version" : "5.1.5"

Logs:
Crashed: OneSignal.OSOperationRepo
0 libobjc.A.dylib 0x3020 objc_msgSend + 32
1 Foundation 0x13a2c _encodeObject + 180
2 OneSignalUser 0x11b48 __swift_destroy_boxed_opaque_existential_0 + 6928
3 OneSignalUser 0x11ba8 __swift_destroy_boxed_opaque_existential_0 + 7024
4 Foundation 0x13e14 _encodeObject + 1180
5 OneSignalOSCore 0xe5c4 __swift_destroy_boxed_opaque_existential_0 + 5632
6 OneSignalOSCore 0xe6d8 __swift_destroy_boxed_opaque_existential_0 + 5908
7 Foundation 0x13e14 _encodeObject + 1180
8 Foundation 0x137b4 -[NSKeyedArchiver _encodeArrayOfObjects:forKey:] + 460
9 Foundation 0x27434 -[NSArray(NSArray) encodeWithCoder:] + 588
10 Foundation 0x13e14 _encodeObject + 1180
11 Foundation 0x199480 +[NSKeyedArchiver archivedDataWithRootObject:] + 104
12 OneSignalCore 0xd69c -[OneSignalUserDefaults saveCodeableDataForKey:withValue:] + 88
13 OneSignalOSCore 0x7d30 __swift_instantiateConcreteTypeFromMangledName + 2856
14 OneSignalOSCore 0x75b8 __swift_instantiateConcreteTypeFromMangledName + 944
15 libdispatch.dylib 0x213c _dispatch_call_block_and_release + 32
16 libdispatch.dylib 0x3dd4 _dispatch_client_callout + 20
17 libdispatch.dylib 0xb400 _dispatch_lane_serial_drain + 748
18 libdispatch.dylib 0xbf30 _dispatch_lane_invoke + 380
19 libdispatch.dylib 0x16cb4 _dispatch_root_queue_drain_deferred_wlh + 288
20 libdispatch.dylib 0x16528 _dispatch_workloop_worker_thread + 404
21 libsystem_pthread.dylib 0x4934 _pthread_wqthread + 288
22 libsystem_pthread.dylib 0x10cc start_wqthread + 8