I'm getting a similar crash, but having to do with setTintColor on UIImageView, but it's not my code:
2019-11-12 10:36:54.498311-0500 <APP NAME>[850:78347] [Assert] Unsupported use of UIKit view-customization API off the main thread. -setTintColor: sent to <UIImageView: 0x155d97130; frame = (0 0; 22 22); clipsToBounds = YES; opaque = NO; userInteractionEnabled = NO; layer = <CALayer: 0x283cc11c0>>
2019-11-12 10:36:54.505194-0500 <APP NAME>[850:78347] This application is modifying the autolayout engine from a background thread after the engine was accessed from the main thread. This can lead to engine corruption and weird crashes.
Stack:(
0 Foundation 0x0000000193176cd4 0DF2911E-80CB-3289-8A1E-ED0913D55A12 + 2251988
1 Foundation 0x0000000192f81fd4 0DF2911E-80CB-3289-8A1E-ED0913D55A12 + 200660
2 Foundation 0x0000000192f81eec 0DF2911E-80CB-3289-8A1E-ED0913D55A12 + 200428
3 Foundation 0x0000000192f81b60 0DF2911E-80CB-3289-8A1E-ED0913D55A12 + 199520
4 UIKitCore 0x00000001971388a0 82C949DD-37F6-35F7-B3EF-62BA342F6BF5 + 15181984
5 UIKitCore 0x00000001971392d8 82C949DD-37F6-35F7-B3EF-62BA342F6BF5 + 15184600
6 QuartzCore 0x00000001996255f8 5A4A8F86-A37D-3290-AC6A-9C03140FA5D3 + 1377784
7 QuartzCore 0x0000000199629e28 5A4A8F86-A37D-3290-AC6A-9C03140FA5D3 + 1396264
8 QuartzCore 0x0000000199635894 5A4A8F86-A37D-3290-AC6A-9C03140FA5D3 + 1443988
9 QuartzCore 0x000000019957e9f0 5A4A8F86-A37D-3290-AC6A-9C03140FA5D3 + 694768
10 QuartzCore 0x00000001995a8890 5A4A8F86-A37D-3290-AC6A-9C03140FA5D3 + 866448
11 QuartzCore 0x00000001995a9814 5A4A8F86-A37D-3290-AC6A-9C03140FA5D3 + 870420
12 libsystem_pthread.dylib 0x00000001929c0350 C3FA4F34-750F-362B-BEFE-835BFB15C0F8 + 58192
13 libsystem_pthread.dylib 0x00000001929bd248 C3FA4F34-750F-362B-BEFE-835BFB15C0F8 + 45640
14 libsystem_pthread.dylib 0x00000001929be29c C3FA4F34-750F-362B-BEFE-835BFB15C0F8 + 49820
15 libsystem_pthread.dylib 0x00000001929be034 _pthread_wqthread + 420
16 libsystem_pthread.dylib 0x00000001929c0ae0 start_wqthread + 8
)
I tried setting a symbolic breakpoint for [UIImageView setTintColor], but it doesn't get hit.