Hi, my Rhino crashes when I use Grasshopper (I've attached the crash report)

Process: Rhinoceros [512]
Path: /Applications/Rhinoceros.app/Contents/MacOS/Rhinoceros
Identifier: com.mcneel.rhinoceros
Version: 5.4.1 (5E409)
Code Type: X86-64 (Native)
Parent Process: ??? [1]
Responsible: Rhinoceros [512]
User ID: 502

Date/Time: 2019-08-14 13:36:16.691 +0800
OS Version: Mac OS X 10.14.6 (18G87)
Report Version: 12
Anonymous UUID: 0B438F03-B582-BBB1-24C1-E6B35F15D6FE

Time Awake Since Boot: 680 seconds

System Integrity Protection: enabled

Crashed Thread: 0 Dispatch queue: com.apple.main-thread

Exception Type: EXC_CRASH (SIGABRT)
Exception Codes: 0x0000000000000000, 0x0000000000000000
Exception Note: EXC_CORPSE_NOTIFY

Application Specific Information:
13:36:16.452: NSEvent: type=Pressure loc=(477.109,487.402) time=681.6 flags=0 win=0x60000010e200 winNum=191 ctxt=0x0 phase=Changed behavior:NSPressureBehaviorPrimaryDeepClick stage:1 pressure:0.525
13:36:16.459: NSEvent: type=LMouseDragged 1 times loc=(477.109,486.039) time=681.6 flags=0 win=0x60000010e200 winNum=191 ctxt=0x0 evNum=208 click=1 buttonNumber=0 pressure=1 deltaX=0.000000 deltaY=1.000000 deviceID:0x300000014400000 subtype=NSEventSubtypeTouch
13:36:16.460: NSEvent: type=Gesture loc=(477.109,486.039) time=681.6 flags=0 win=0x60000010e200 winNum=191 ctxt=0x0 subtype=0
13:36:16.460: NSEvent: type=Pressure loc=(477.109,486.039) time=681.6 flags=0 win=0x60000010e200 winNum=191 ctxt=0x0 phase=Changed behavior:NSPressureBehaviorPrimaryDeepClick stage:1 pressure:0.542
13:36:16.468: NSEvent: type=LMouseDragged 1 times loc=(477.109,484.195) time=681.6 flags=0 win=0x60000010e200 winNum=191 ctxt=0x0 evNum=208 click=1 buttonNumber=0 pressure=1 deltaX=0.000000 deltaY=2.000000 deviceID:0x300000014400000 subtype=NSEventSubtypeTouch
13:36:16.468: NSEvent: type=Gesture loc=(477.109,484.195) time=681.6 flags=0 win=0x60000010e200 winNum=191 ctxt=0x0 subtype=0
13:36:16.468: NSEvent: type=Pressure loc=(477.109,484.195) time=681.6 flags=0 win=0x60000010e200 winNum=191 ctxt=0x0 phase=Changed behavior:NSPressureBehaviorPrimaryDeepClick stage:1 pressure:0.558
13:36:16.476: NSEvent: type=LMouseDragged 1 times loc=(477.109,481.816) time=681.6 flags=0 win=0x60000010e200 winNum=191 ctxt=0x0 evNum=208 click=1 buttonNumber=0 pressure=1 deltaX=0.000000 deltaY=2.000000 deviceID:0x300000014400000 subtype=NSEventSubtypeTouch
13:36:16.476: NSEvent: type=Gesture loc=(477.109,481.816) time=681.6 flags=0 win=0x60000010e200 winNum=191 ctxt=0x0 subtype=0
13:36:16.476: NSEvent: type=Pressure loc=(477.109,481.816) time=681.6 flags=0 win=0x60000010e200 winNum=191 ctxt=0x0 phase=Changed behavior:NSPressureBehaviorPrimaryDeepClick stage:1 pressure:0.573

13:27:26.303: start command ‘GrasshopperUnloadPlugin’ appstate 1
13:27:26.310: end command ‘GrasshopperUnloadPlugin’ appstate 3
13:27:33.193: start command ‘GrasshopperFolders’ appstate 1
13:27:34.787: end command ‘GrasshopperFolders’ appstate 3
13:29:38.060: start command ‘Delete’ appstate 1
13:29:38.060: end command ‘Delete’ appstate 3
13:29:41.043: start command ‘GrasshopperFolders’ appstate 1
13:29:42.493: end command ‘GrasshopperFolders’ appstate 3
13:29:42.765: start saveToURL:ofType:forSaveOperation:completionHandler NSAutosaveInPlaceOperation grasshopper practice .3dm 0x7fb6bf64a640
13:29:42.932: finish saveToURL:ofType:forSaveOperation:completionHandler
13:35:24.689: start command ‘Grasshopper’ appstate 1
13:35:34.053: end command ‘Grasshopper’ appstate 3

13:35:24.689: Grasshopper command executed

[ERROR] .NET STACK TRACE:
at MonoMac.AppKit.NSView.BeginDraggingSession(MonoMac.AppKit.NSDraggingItem itmes, MonoMac.AppKit.NSEvent evnt, MonoMac.AppKit.NSDraggingSource source)
at System.Windows.Forms.Control+DragInfo…ctor(System.Windows.Forms.Control control, System.Object data, DragDropEffects allowedEffects)
at System.Windows.Forms.Control.DoDragDrop(System.Object data, DragDropEffects allowedEffects)
at Grasshopper.GUI.Ribbon.GH_RibbonItem.MouseMove(Grasshopper.GUI.Ribbon.GH_Ribbon sender, Grasshopper.GUI.Ribbon.GH_RibbonMouseEventArgs e)
at Grasshopper.GUI.Ribbon.GH_Ribbon.GH_RibbonControl_MouseMove(System.Object sender, System.Windows.Forms.MouseEventArgs e)
at System.Windows.Forms.Control.OnMouseMove(System.Windows.Forms.MouseEventArgs e)
at System.Windows.Forms.Control.FireMouseMove(System.Object sender, System.Windows.Forms.MouseEventArgs e)
at System.Windows.Forms.ScrollViewHelper.MouseDragged(MonoMac.AppKit.NSEvent theEvent)
at System.Object.[System.Windows.Forms.ScrollViewHelper:Void MouseDragged(MonoMac.AppKit.NSEvent)](MonoMac.Foundation.NSObject , IntPtr , MonoMac.AppKit.NSEvent )
*** Terminating app due to uncaught exception ‘NSRangeException’, reason: ‘NSDraggingItem.draggingFrame cannot be set to a zero size {{0, 531}, {0, 0}}’
terminating with uncaught exception of type NSException
abort() called

Please start by updating to the final build of V5 Mac Rhino 5.5.4
https://www.rhino3d.com/download/rhino/5/latest

Then can you repeat the crash?