Constraint warnings when pushing SBUChannelViewController

I’m getting constraint warnings when pushing SBUChannelViewController(). I tried to shrink the problem to the shortest possible source code:

    import UIKit
    import SendBirdUIKit

    class ViewController: UIViewController {
    private enum Constants {
        static let appId = ""
        static let userId = ""
        static let token = ""
    override func viewDidLoad() {
        SBUMain.initialize(applicationId: Constants.appId)
        SBUGlobals.CurrentUser = SBUUser(userId: Constants.userId)
        SBUGlobals.AccessToken = Constants.token
        SBUMain.connect(completionHandler: { user, error in
            print("user: \(user), error: \(error)")
    override func viewDidAppear(_ animated: Bool) {
        let navvc = UINavigationController(rootViewController: ViewController2())
        navvc.modalPresentationStyle = .fullScreen
        present(navvc, animated: false)

class ViewController2: UIViewController {
    override func viewDidLoad() {
        let btn = UIButton(frame: .init(x: 100, y: 200, width: 200, height: 50))
        btn.setTitle("open channel", for: .normal)
        btn.addTarget(self, action: #selector(openChannel), for: .touchUpInside)
    @objc func openChannel() {
        let channelListQuery = SBDGroupChannel.createMyGroupChannelListQuery()
        channelListQuery?.loadNextPage(completionHandler: { [weak self] channels, error in
            guard let channel = channels?.first else {
                print("loadNextPageError: \(error)")
            let channelVC = SBUChannelViewController(channel: channel)
            self?.navigationController?.pushViewController(channelVC, animated: true)

SendBirdSDK: 3.0.211
SendBirdUIKit: 1.2.11
Device: iPhone XR, iOS 14.3

Here is one of the warnings:

Make a symbolic breakpoint at UIViewAlertForUnsatisfiableConstraints to catch this in the debugger.
The methods in the UIConstraintBasedLayoutDebugging category on UIView listed in <UIKitCore/UIView.h> may also be helpful.
2020-12-21 16:56:21.533222+0100 Messaging[32290:822928] [LayoutConstraints] Unable to simultaneously satisfy constraints.
	Probably at least one of the constraints in the following list is one you don't want. 
	Try this: 
		(1) look at each constraint and try to figure out which you don't expect; 
		(2) find the code that added the unwanted constraint or constraints and fix it. 
    "<NSLayoutConstraint:0x6000000a82d0 UIView:0x7fd985637840.width == 0   (active)>",
    "<NSLayoutConstraint:0x6000000dfac0 H:|-(20)-[UIStackView:0x7fd98561b820]   (active, names: '|':SendBirdUIKit.SBUMessageInputView:0x7fd985636d00 )>",
    "<NSLayoutConstraint:0x6000000dfb10 UIStackView:0x7fd98561b820.trailing == SendBirdUIKit.SBUMessageInputView:0x7fd985636d00.trailing - 16   (active)>",
    "<NSLayoutConstraint:0x600000096210 H:|-(0)-[SendBirdUIKit.SBUMessageInputView:0x7fd985636d00](LTR)   (active, names: '|':UIView:0x7fd985622ec0 )>",
    "<NSLayoutConstraint:0x600000096260 SendBirdUIKit.SBUMessageInputView:0x7fd985636d00.right == UIView:0x7fd985622ec0.right   (active)>",
    "<NSLayoutConstraint:0x600000093930 'UISV-alignment' UIView:0x7fd985636f60.leading == UIView:0x7fd985637840.leading   (active)>",
    "<NSLayoutConstraint:0x600000093a20 'UISV-alignment' UIView:0x7fd985636f60.trailing == UIView:0x7fd985637840.trailing   (active)>",
    "<NSLayoutConstraint:0x6000000937a0 'UISV-canvas-connection' UIStackView:0x7fd98561b820.leading == UIView:0x7fd985636f60.leading   (active)>",
    "<NSLayoutConstraint:0x6000000937f0 'UISV-canvas-connection' H:[UIView:0x7fd985636f60]-(0)-|   (active, names: '|':UIStackView:0x7fd98561b820 )>",
    "<NSLayoutConstraint:0x6000000dd0e0 'UIView-Encapsulated-Layout-Width' UIView:0x7fd985622ec0.width == 414   (active)>"

Will attempt to recover by breaking constraint 
<NSLayoutConstraint:0x6000000a82d0 UIView:0x7fd985637840.width == 0   (active)>

I’m also getting a ton of constraint warnings on this view controller. Would be great to get these resolved.