Fatal error (crash) when viewing Remote repositories

Unable to add a new remote repository or edit remote accounts, because SourceTree crashes after clicking on the Remote button on the New Tab page.

After each crash, Windows Event Viewer shows 2 errors and 1 information event.

Error 1 (source: .NET Runtime)

Application: SourceTree.exe
Framework Version: v4.0.30319
Description: The process was terminated due to an unhandled exception.
Exception Info: Newtonsoft.Json.JsonReaderException
   at Newtonsoft.Json.JsonTextReader.ParseValue()
   at Newtonsoft.Json.JsonReader.ReadForType(Newtonsoft.Json.Serialization.JsonContract, Boolean)
   at Newtonsoft.Json.Serialization.JsonSerializerInternalReader.Deserialize(Newtonsoft.Json.JsonReader, System.Type, Boolean)
   at Newtonsoft.Json.JsonSerializer.DeserializeInternal(Newtonsoft.Json.JsonReader, System.Type)
   at Newtonsoft.Json.JsonConvert.DeserializeObject(System.String, System.Type, Newtonsoft.Json.JsonSerializerSettings)
   at SourceTree.Host.Bitbucket.RefitApiExceptionWrapper..ctor(Refit.ApiException)
   at SourceTree.Host.Bitbucket.RefitApiExceptionGenerator.GenerateFromApiException(System.String, Refit.ApiException, SourceTree.Model.IAccount)
   at SourceTree.Host.Bitbucket.RefitApiExceptionGenerator.GenerateException(System.String, System.Exception, SourceTree.Model.IAccount)
   at SourceTree.Host.Bitbucket.BitbucketHost+<ListGroupingsForUser>d__35.MoveNext()
   at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
   at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(System.Threading.Tasks.Task)
   at System.Runtime.CompilerServices.TaskAwaiter`1[[System.__Canon, mscorlib, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089]].GetResult()
   at SourceTree.ViewModel.Hosted.HostedProjectsViewModel+<RefreshGroupingList>d__97.MoveNext()
   at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
   at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(System.Threading.Tasks.Task)
   at System.Runtime.CompilerServices.TaskAwaiter.GetResult()
   at SourceTree.ViewModel.Hosted.HostedProjectsViewModel+<<-ctor>b__49_8>d.MoveNext()
   at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
   at System.Windows.Threading.ExceptionWrapper.InternalRealCall(System.Delegate, System.Object, Int32)
   at System.Windows.Threading.ExceptionWrapper.TryCatchWhen(System.Object, System.Delegate, System.Object, Int32, System.Delegate)
   at System.Windows.Threading.DispatcherOperation.InvokeImpl()
   at MS.Internal.CulturePreservingExecutionContext.CallbackWrapper(System.Object)
   at System.Threading.ExecutionContext.RunInternal(System.Threading.ExecutionContext, System.Threading.ContextCallback, System.Object, Boolean)
   at System.Threading.ExecutionContext.Run(System.Threading.ExecutionContext, System.Threading.ContextCallback, System.Object, Boolean)
   at System.Threading.ExecutionContext.Run(System.Threading.ExecutionContext, System.Threading.ContextCallback, System.Object)
   at MS.Internal.CulturePreservingExecutionContext.Run(MS.Internal.CulturePreservingExecutionContext, System.Threading.ContextCallback, System.Object)
   at System.Windows.Threading.DispatcherOperation.Invoke()
   at System.Windows.Threading.Dispatcher.ProcessQueue()
   at System.Windows.Threading.Dispatcher.WndProcHook(IntPtr, Int32, IntPtr, IntPtr, Boolean ByRef)
   at MS.Win32.HwndWrapper.WndProc(IntPtr, Int32, IntPtr, IntPtr, Boolean ByRef)
   at MS.Win32.HwndSubclass.DispatcherCallbackOperation(System.Object)
   at System.Windows.Threading.ExceptionWrapper.InternalRealCall(System.Delegate, System.Object, Int32)
   at System.Windows.Threading.ExceptionWrapper.TryCatchWhen(System.Object, System.Delegate, System.Object, Int32, System.Delegate)
   at System.Windows.Threading.Dispatcher.LegacyInvokeImpl(System.Windows.Threading.DispatcherPriority, System.TimeSpan, System.Delegate, System.Object, Int32)
   at MS.Win32.HwndSubclass.SubclassWndProc(IntPtr, Int32, IntPtr, IntPtr)
   at MS.Win32.UnsafeNativeMethods.DispatchMessage(System.Windows.Interop.MSG ByRef)
   at System.Windows.Threading.Dispatcher.PushFrameImpl(System.Windows.Threading.DispatcherFrame)
   at System.Windows.Application.RunDispatcher(System.Object)
   at System.Windows.Application.RunInternal(System.Windows.Window)
   at SourceTree.App.Main()

Error 2 (source: Application Error)

Faulting application name: SourceTree.exe, version: 3.4.12.0, time stamp: 0x63f70216
Faulting module name: KERNELBASE.dll, version: 10.0.19041.2728, time stamp: 0xe7e53a4e
Exception code: 0xe0434352
Fault offset: 0x000000000002cd29
Faulting process id: 0x2cc8
Faulting application start time: 0x01d976e2701b1e08
Faulting application path: C:\Users\xxxxxxxx\AppData\Local\SourceTree\app-3.4.12\SourceTree.exe
Faulting module path: C:\windows\System32\KERNELBASE.dll
Report Id: 649c13a3-38ae-40d2-98ea-3ec8aba98ef4
Faulting package full name: 
Faulting package-relative application ID: 

Related Information event:

Fault bucket 2105519342835127011, type 5
Event Name: CLR20r3
Response: Not available
Cab Id: 0

Problem signature:
P1: SourceTree.exe
P2: 3.4.12.0
P3: 63f70216
P4: Newtonsoft.Json
P5: 12.0.1.22727
P6: dcabace8
P7: 236
P8: 2a3
P9: Newtonsoft.Json.JsonReader
P10: 

Attached files:
\\?\C:\ProgramData\Microsoft\Windows\WER\Temp\WER20DE.tmp.dmp
\\?\C:\ProgramData\Microsoft\Windows\WER\Temp\WER240C.tmp.WERInternalMetadata.xml
\\?\C:\ProgramData\Microsoft\Windows\WER\Temp\WER243C.tmp.xml
\\?\C:\ProgramData\Microsoft\Windows\WER\Temp\WER2449.tmp.csv
\\?\C:\ProgramData\Microsoft\Windows\WER\Temp\WER2498.tmp.txt

These files may be available here:
\\?\C:\ProgramData\Microsoft\Windows\WER\ReportArchive\AppCrash_SourceTree.exe_4263896d348285ff466d73dd3fb26f36837d98_58fdf357_8bad0ce9-aa91-4712-93d1-91e1867d9995

Analysis symbol: 
Rechecking for solution: 0
Report Id: 649c13a3-38ae-40d2-98ea-3ec8aba98ef4
Report Status: 268435456
Hashed bucket: 650dd00c63578919cd384eafd166d2e3
Cab Guid: 0