NSInternalInconsistencyException Unexpected subviews

[dlpigpen]

I got a crash "NSInternalInconsistencyException Unexpected subviews in the PatchedPageViewController.swift line 13" from your library and it is occurring usually.

Here is the crash log that i got from Firebase. Could you please take a look and give me a direction to fix it?

Fatal Exception: NSInternalInconsistencyException
0  CoreFoundation                 0x1a99e3180 (Missing)
1  libobjc.A.dylib                0x1a8bbb9f8 objc_exception_throw
2  CoreFoundation                 0x1a98fc88c (Missing)
3  Foundation                     0x1aa3c0b38 (Missing)
4  UIKitCore                      0x1d5bc2684 -[_UIQueuingScrollView _setWrappedViewAtIndex:withView:]
5  UIKitCore                      0x1d5bc2cf4 -[_UIQueuingScrollView _replaceViews:updatingContents:adjustContentInsets:animated:]
6  UIKitCore                      0x1d5bc4594 -[_UIQueuingScrollView _enqueueAnimatedScrollInDirection:withView:completion:]
7  UIKitCore                      0x1d5bc5164 -[_UIQueuingScrollView setView:direction:animated:completion:]
8  UIKitCore                      0x1d5bb7e30 -[UIPageViewController _setViewControllers:withScrollInDirection:animated:completion:]
9  UIKitCore                      0x1d5bb8014 -[UIPageViewController setViewControllers:direction:animated:completion:]
10 Pageboy                        0x101979350 PatchedPageViewController.setViewControllers(_:direction:animated:completion:) + 13 (PatchedPageViewController.swift:13)
11 Pageboy                        0x101979844 @objc PatchedPageViewController.setViewControllers(_:direction:animated:completion:) (<compiler-generated>)
12 Pageboy                        0x10196cf24 closure #2 in PageboyViewController._updateViewControllers(to:from:to:direction:animated:async:force:completion:) + 132 (PageboyViewController+Management.swift:132)
13 Pageboy                        0x10196f4b4 partial apply for closure #2 in PageboyViewController._updateViewControllers(to:from:to:direction:animated:async:force:completion:) (<compiler-generated>)
14 Pageboy                        0x10196f510 partial apply for closure #3 in PageboyViewController._updateViewControllers(to:from:to:direction:animated:async:force:completion:) + 152 (PageboyViewController+Management.swift:152)
15 Pageboy                        0x1019791b4 thunk for @escaping @callee_guaranteed () -> () (<compiler-generated>)
16 libdispatch.dylib              0x1a9420a38 _dispatch_call_block_and_release
17 libdispatch.dylib              0x1a94217d4 _dispatch_client_callout
18 libdispatch.dylib              0x1a93cf008 _dispatch_main_queue_callback_4CF$VARIANT$mp
19 CoreFoundation                 0x1a9974b20 (Missing)
20 CoreFoundation                 0x1a996fa58 (Missing)
21 CoreFoundation                 0x1a996efb4 CFRunLoopRunSpecific
22 GraphicsServices               0x1abb7079c GSEventRunModal
23 UIKitCore                      0x1d61d1c38 UIApplicationMain`