FMX plugin with EStyleException

In Delphi 10, I build VCL host & FMX plugin application, but get this exception when close application:
Project xx raised exception class EStyleException with message ‘Argument must not be nil’.
The Sample project: Hydra for Delphi\FireMonkey\FMXHost project have same problem. How can I do?

Thanks, logged as bugs://76561

pls update FMXPlugin.dpr as

library FMXPlugin;

uses
  System.SysUtils,
  System.Classes,
  FMX.Forms,  FMX.Types,  //<<<<<added
  hcFMXPluginController in 'hcFMXPluginController.pas' {FMXPluginController: THYModuleController},
  FmxNonVisualPlugin in 'FmxNonVisualPlugin.pas' {FMXNonVisualPlugin: THYFMXNonVisualPlugin},
  FmxVisualPlugin in 'FmxVisualPlugin.pas' {FmxVisualPlugin: THYFMXVisualPlugin};

{#HYDRAMODULE}
{$R *.res}
{$R HYFMXSIGNATURE.RES}

begin
end.

this is known FMX bug ( https://quality.embarcadero.com/browse/RSP-15178 ) and it isn’t fixed yet.

bugs://76561 got closed with status fixed.

Logged as bugs://i64432.

bugs://i64432 was closed as fixed.