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Error Loading Forms Editor: Could not load file or assembly 'CefSharp.Core.dll'

I am using Bizagi 10.7 and some of my machines are presenting an error when trying to edit a form.

The operating systems are Windows 10 and Windows Server R2 2012 Standard.

Tryied all sort of things without success.

The complete error msg is bellow:

Could not load file or assembly 'CefSharp.Core.dll' or one of its dependencies. Não foi possível encontrar o módulo especificado.

System.Reflection.TargetInvocationException: Exception has been thrown by the target of an invocation. ---> System.IO.FileNotFoundException: Could not load file or assembly 'CefSharp.Core.dll' or one of its dependencies. Não foi possível encontrar o módulo especificado.

at BizAgiStudio.Forms.Modeler.Web.Editor.View.FrmModelerWeb.InitializeBrowser()

at BizAgiStudio.Forms.Modeler.Web.Editor.View.FrmModelerWeb..ctor(Action`1 formclose, IModelerWebPresenterFactory modelerWebPresenterFactory, IWindowsFormsInvoker windowsFormsInvoker)

--- End of inner exception stack trace ---

at System.RuntimeMethodHandle.InvokeMethod(Object target, Object[] arguments, Signature sig, Boolean constructor)

at System.Reflection.RuntimeConstructorInfo.Invoke(BindingFlags invokeAttr, Binder binder, Object[] parameters, CultureInfo culture)

at BizAgi.Commons.DependencyInjection.DependencyInjector.AssistedInjection.ByConstructor.AssistedFactoryProvider.InterfaceMethodInterceptor.Intercept(IInvocation invocation)

at Castle.DynamicProxy.AbstractInvocation.Proceed()

at Castle.Proxies.IModelerWebFactoryProxy.Create(Action`1 formclose)

at BizAgiStudio.Forms.Modeler.Web.FormsModelerProcessArchitectureFacadex86.OpenForm(Guid idForm, Action`1 formClosed, Boolean isShowDialog)

at BizAgiStudio.Forms.Modeler.Web.WebFormsModelerFacade.OpenForm(Guid idForm, Action`1 formClosed)

at BizAgiStudio.Forms.Modeler.Web.WebFormsModelerFacade.OpenForm(Guid idForm)

at Castle.Proxies.Invocations.IWebFormsModelerFacade_OpenForm.InvokeMethodOnTarget()

at Castle.DynamicProxy.AbstractInvocation.Proceed()

at Castle.DynamicProxy.AbstractInvocation.Proceed()

at BizAgiStudio.EntityManagerPlugin.Logic.FormsPlugInLogic.EditForm(Guid formId, Int32 formsVersion)

at BizAgiStudio.EntityManagerPlugin.Logic.FormsPlugInLogic.OpenForm(FormsLogicParam p)

at BizAgiStudio.Carrousel.Controls.CarrouselContainer.HandleShapeClickForDefineForms(ModelerProcessControl processControl, BaseShape shape)

at BizAgiStudio.Carrousel.Controls.CarrouselContainer.OnModelerProcessControlShapeClick(Object sender, CrainiateElementEventArgs`1 e)

at BizAgi.PM.UI.Controls.DiagramFlowChart.OnElementClick(Element element)

at Crainiate.ERM4.Diagram.OnClick(EventArgs e)

at System.Windows.Forms.Control.WmMouseUp(Message& m, MouseButtons button, Int32 clicks)

at System.Windows.Forms.Control.WndProc(Message& m)

at Crainiate.ERM4.Diagram.WndProc(Message& m)

at System.Windows.Forms.NativeWindow.Callback(IntPtr hWnd, Int32 msg, IntPtr wparam, IntPtr lparam)

Comments (7)


Got to solve using the following strategy:

1) Uninstalled all Microsoft C++ Redistributable packages that are installed in the machines;

2) Installed new ones (x86 and x64) - 2012 and 2013 (in one machine on ly worked after these two versions were installed. In other, 2013 was suficient).

Don´t know exactly why, but solved the problem for now.


Same problem returning in another client.

Windows Server this time. 2 weeks lost in this ...


Dear Carlos,

Have you already reinstalled your .NET framework? Please try it and tell us the results.

We look forward to hearing from you


I've the same problem.

The host is Windows Server 2012 R2 and after of to search in the folder c:\programs file\bizagi\bizagistudio\studio all ".dll's" are there.

Could you help?


Dear Alexandre,

Please reinstall your .NET Framework and try again.

We look forward to hearing from you


In fact, we decided to redo all Windows Server 2012 R2 instalation,

but for no avail.

We did not figure

out how to reinstall .net framework. It is not available in Programs &

Features in Control Panel.

If we disable it

in Server Configuration, Windows disables GUI. Got some problem with that

(solved with this article

If we try to

install from an Offline package, it show the message : ".NET Framework

4.6.1 or a later update is already installed on this computer".

Where to go ?


Dear Carlos,

Thank you for your feedback. Please send us message from Windows event viewer regarding Bizagi issues. In addition, send us a screenshot of this problem.

We look forward to hearing from you