Open an ssh session crash RDM on Ubuntu 20.04

RDM crashes whenever I try to open any ssh sessions. Below are the stack traces. RDM version is 2020.2.3.0

Exception in Gtk# callback delegate
Note: Applications can use GLib.ExceptionManager.UnhandledException to handle the exception.
Gtk.Builder+HandlerNotFoundException: No handler OnBtnOkClicked found for signal clicked
at Gtk.Builder+SignalConnector.ConnectFunc (Gtk.Builder builder, GLib.Object objekt, System.String signal_name, System.String handler_name, GLib.Object connect_object, GLib.ConnectFlags flags) [0x000f5] in <c2feb1c5d39a4660b3f5c10dab7825eb>:0
at GtkSharp.BuilderConnectFuncWrapper.NativeCallback (System.IntPtr builder, System.IntPtr objekt, System.IntPtr signal_name, System.IntPtr handler_name, System.IntPtr connect_object, System.Int32 flags, System.IntPtr user_data) [0x0002b] in <c2feb1c5d39a4660b3f5c10dab7825eb>:0
at GLib.ExceptionManager.RaiseUnhandledException (System.Exception e, System.Boolean is_terminal) [0x00000] in <5a34df7d261240358d61453b6bc52857>:0
at GtkSharp.BuilderConnectFuncWrapper.NativeCallback (System.IntPtr builder, System.IntPtr objekt, System.IntPtr signal_name, System.IntPtr handler_name, System.IntPtr connect_object, System.Int32 flags, System.IntPtr user_data) [0x00000] in <c2feb1c5d39a4660b3f5c10dab7825eb>:0
at System.Object.wrapper_native_0x7f174a183ae0 (System.IntPtr , GtkSharp.BuilderConnectFuncNative , System.IntPtr ) [0x00000] in <a17fa1457c5d44f2885ac746c1764ea5>:0
at Gtk.Builder+SignalConnector.ConnectSignals () [0x00000] in <c2feb1c5d39a4660b3f5c10dab7825eb>:0
at Gtk.Builder.Autoconnect (System.Object handler) [0x00000] in <c2feb1c5d39a4660b3f5c10dab7825eb>:0
at Client.Windows.PrivateKeyPassphraseWindow..ctor (Gtk.Builder builder) [0x00000] in <07af1acce5f745dfba5c26585148f32a>:0
at Client.Windows.PrivateKeyPassphraseWindow..ctor () [0x00000] in <07af1acce5f745dfba5c26585148f32a>:0
at Devolutions.RemoteDesktopManager.Managers.UIManager.ShowPrivateKeyPassphrase () [0x00000] in <07af1acce5f745dfba5c26585148f32a>:0
at Devolutions.RemoteDesktopManager.Business.Connectors.EmbeddedSshTerminalConnector.SetTerminal (Devolutions.Protocols.SshTerminal terminal, Devolutions.RemoteDesktopManager.Business.Connection connection) [0x00000] in <07af1acce5f745dfba5c26585148f32a>:0
at Client.Views.Embedded.EmbeddedSshTerminalView.Setup (Devolutions.RemoteDesktopManager.Business.Connection connection, Devolutions.RemoteDesktopManager.OpenConnectionMode mode) [0x00000] in <07af1acce5f745dfba5c26585148f32a>:0
at Devolutions.RemoteDesktopManager.Managers.EmbeddedViewManager.OpenInternal (Client.Interfaces.IEmbeddedView frame, Devolutions.RemoteDesktopManager.Business.Connection connection, System.Boolean isConnected, Devolutions.RemoteDesktopManager.OpenConnectionMode openConnectionMode, Core.Graphics.IImage image, System.Boolean isEmbeddedConnection) [0x00000] in <07af1acce5f745dfba5c26585148f32a>:0
at Devolutions.RemoteDesktopManager.Managers.EmbeddedViewManager.Open (Devolutions.RemoteDesktopManager.Business.Connection connection, Client.Interfaces.IEmbeddedView frame, System.Boolean isConnected, Devolutions.RemoteDesktopManager.OpenConnectionMode openConnectionMode, System.Boolean undocked, Core.Graphics.IImage image, System.Boolean isEmbeddedConnection) [0x00000] in <07af1acce5f745dfba5c26585148f32a>:0
at Devolutions.RemoteDesktopManager.Business.Connectors.EmbeddedConnector.Connect (Devolutions.RemoteDesktopManager.Business.Connection connection, Devolutions.RemoteDesktopManager.OpenConnectionMode openConnectionMode, Devolutions.RemoteDesktopManager.Forms.IForm undockedWindow) [0x00000] in <07af1acce5f745dfba5c26585148f32a>:0
at Devolutions.RemoteDesktopManager.Managers.ConnectionManager.OpenConnection (Devolutions.RemoteDesktopManager.Business.Connection connection, Devolutions.RemoteDesktopManager.Business.OpenConnectionParameter parameter, Devolutions.RemoteDesktopManager.Forms.IForm undockedWindow) [0x00000] in <97c95ba0b56a477fab7460f3ffd0dfc0>:0
at Devolutions.RemoteDesktopManager.Managers.ConnectionManager.OpenConnections (Devolutions.RemoteDesktopManager.Business.Connection[] connectionList, Devolutions.RemoteDesktopManager.Business.OpenConnectionParameter parameter) [0x00000] in <97c95ba0b56a477fab7460f3ffd0dfc0>:0
at Devolutions.RemoteDesktopManager.Managers.ActionManager.DoOpenConnection (Devolutions.RemoteDesktopManager.Business.Connection[] currentConnections, Devolutions.RemoteDesktopManager.OpenConnectionMode openConnectionMode, Devolutions.RemoteDesktopManager.IConnectionSource source) [0x00000] in <07af1acce5f745dfba5c26585148f32a>:0
at Devolutions.RemoteDesktopManager.Managers.ActionManager.OpenConnections (Devolutions.RemoteDesktopManager.OpenConnectionMode openConnectionMode, Devolutions.RemoteDesktopManager.IConnectionSource source, System.Boolean checkOpenedConnection) [0x00000] in <07af1acce5f745dfba5c26585148f32a>:0
at Devolutions.RemoteDesktopManager.Managers.ActionStateManager+<>c.<get_OpenSessionState>b__88_2 (Devolutions.RemoteDesktopManager.IConnectionSource source) [0x00000] in <07af1acce5f745dfba5c26585148f32a>:0
at Client.Views.Controls.ActionButton.<set_ActionState>b__5_0 (System.Object sender, System.EventArgs args) [0x00000] in <07af1acce5f745dfba5c26585148f32a>:0
at System.Reflection.RuntimeMethodInfo.InternalInvoke (System.Reflection.RuntimeMethodInfo , System.Object , System.Object[] , System.Exception& ) [0x00000] in <a17fa1457c5d44f2885ac746c1764ea5>:0
at System.Reflection.RuntimeMethodInfo.Invoke (System.Object obj, System.Reflection.BindingFlags invokeAttr, System.Reflection.Binder binder, System.Object[] parameters, System.Globalization.CultureInfo culture) [0x00000] in <a17fa1457c5d44f2885ac746c1764ea5>:0
at System.Reflection.MethodBase.Invoke (System.Object obj, System.Object[] parameters) [0x00000] in <a17fa1457c5d44f2885ac746c1764ea5>:0
at System.Delegate.DynamicInvokeImpl (System.Object[] args) [0x00000] in <a17fa1457c5d44f2885ac746c1764ea5>:0
at System.MulticastDelegate.DynamicInvokeImpl (System.Object[] args) [0x00000] in <a17fa1457c5d44f2885ac746c1764ea5>:0
at System.Delegate.DynamicInvoke (System.Object[] args) [0x00000] in <a17fa1457c5d44f2885ac746c1764ea5>:0
at GLib.Signal.ClosureInvokedCB (System.Object o, GLib.ClosureInvokedArgs args) [0x00000] in <5a34df7d261240358d61453b6bc52857>:0
at GLib.SignalClosure.Invoke (GLib.ClosureInvokedArgs args) [0x00000] in <5a34df7d261240358d61453b6bc52857>:0
at GLib.SignalClosure.MarshalCallback (System.IntPtr raw_closure, System.IntPtr return_val, System.UInt32 n_param_vals, System.IntPtr param_values, System.IntPtr invocation_hint, System.IntPtr marshal_data) [0x00000] in <5a34df7d261240358d61453b6bc52857>:0
at System.Object.wrapper_native_0x7f174a29c300 () [0x00000] in <a17fa1457c5d44f2885ac746c1764ea5>:0
at Gtk.Application.Run () [0x00000] in <c2feb1c5d39a4660b3f5c10dab7825eb>:0
at Devolutions.RemoteDesktopManager.Program.Main (System.String[] args) [0x00000] in <66b30c1126f54204aa1031dd4819129b>:0