Similar unsolved error here too:
Occurs when try to render comments page. I'm using Zendesk classic sdk v7.0.0
Crashed: com.apple.main-thread
0  SupportSDK                     0x96a38 _swift_stdlib_malloc_size + 29096
1  SupportSDK                     0x99e6c _swift_stdlib_malloc_size + 42460
2  UIKitCore                      0x232d1c <redacted> + 476
3  UIKitCore                      0x232ae8 <redacted> + 264
4  UIKitCore                      0x4364 <redacted> + 840
5  QuartzCore                     0x9aa4 <redacted> + 496
6  UIKitCore                      0xc6078 <redacted> + 292
7  UIKitCore                      0x3a56c <redacted> + 812
8  UIKitCore                      0x3a23c <redacted> + 416
9  UIKitCore                      0x18fcf8 <redacted> + 448
10 UIKitCore                      0x164694 <redacted> + 264
11 UIKitCore                      0x162158 <redacted> + 124
12 UIKitCore                      0x527ad0 <redacted> + 432
13 UIKitCore                      0x521d48 <redacted> + 284
14 UIKitCore                      0x437438 <redacted> + 232
15 UIKitCore                      0x4a062c <redacted> + 328
16 UIKitCore                      0x51f108 <redacted> + 244
17 UIKitCore                      0x327d7c <redacted> + 236
18 UIKitCore                      0x327670 <redacted> + 980
19 UIKitCore                      0x32721c <redacted> + 272
20 UIKitCore                      0xd2d90 <redacted> + 108
21 UIKitCore                      0x2000b8 <redacted> + 168
22 UIKitCore                      0x37f1e4 <redacted> + 140
23 UIKitCore                      0x2a863c <redacted> + 476
24 UIKitCore                      0x2a8424 <redacted> + 500
25 UIKitCore                      0x2a8128 <redacted> + 1092
26 UIKitCore                      0x2a74b8 <redacted> + 320
27 UIKitCore                      0xca00b4 <redacted> + 104
28 UIKitCore                      0x2a6ea8 <redacted> + 188
29 UIKitCore                      0x282614 <redacted> + 864
30 UIKitCore                      0x3f55a0 <redacted> + 1036
31 UIKitCore                      0x283ee8 <redacted> + 84
32 UIKitCore                      0xde20c0 <redacted> + 100
33 UIKitCore                      0xde2200 <redacted> + 288
34 UIKitCore                      0xde2050 <redacted> + 76
35 UIKitCore                      0xde07d0 <redacted> + 224
36 UIKitCore                      0x8ebf3c <redacted> + 656
37 UIKitCore                      0x97fc78 _UISceneSettingsDiffActionPerformChangesWithTransitionContextAndCompletion + 196
38 UIKitCore                      0x12c57c <redacted> + 784
39 UIKitCore                      0x12b2b8 <redacted> + 1124
40 UIKitCore                      0x55f870 <redacted> + 552
41 UIKitCore                      0x1f1bfc <redacted> + 208
42 UIKitCore                      0x1f1a90 <redacted> + 220
43 UIKitCore                      0x1f18ec <redacted> + 308
44 FrontBoardServices             0x3c40 <redacted> + 392
45 FrontBoardServices             0x3a98 <redacted> + 124
46 FrontBoardServices             0x6efc <redacted> + 160
47 FrontBoardServices             0x6e24 <redacted> + 312
48 libdispatch.dylib              0x64780 <redacted> + 16
49 libdispatch.dylib              0x3c2d0 <redacted> + 212
50 FrontBoardServices             0x10410 <redacted> + 44
51 FrontBoardServices             0x1004c <redacted> + 176
52 FrontBoardServices             0x12600 <redacted> + 24
53 CoreFoundation                 0xc90e8 <redacted> + 24
54 CoreFoundation                 0xd4d5c <redacted> + 172
55 CoreFoundation                 0x5ffc4 <redacted> + 232
56 CoreFoundation                 0x75138 <redacted> + 784
57 CoreFoundation                 0x79d20 CFRunLoopRunSpecific + 584
58 GraphicsServices               0x1998 GSEventRunModal + 160
59 UIKitCore                      0x37180c <redacted> + 868
60 UIKitCore                      0x371484 UIApplicationMain + 312
61 Runner                         0xa2b4 main + 6 (AppDelegate.swift:6)
62 ???                            0x1ec464344 (Missing)