Docker Desktop for Windows 2.4.0.0 (48506) Startup error after update

error contents

System.NullReferenceException:
Object reference not set to an instance of an object.
Location Docker.Engines.IsoConfig.Meta(Object value)Location C:\workspaces\stable-2.4.x\src\github.com\docker\pinata\win\src\Docker.Desktop\Engines\IsoConfig.cs:Line 146
Location Docker.Engines.IsoConfig.GenerateConfig(Settings settings)Location C:\workspaces\stable-2.4.x\src\github.com\docker\pinata\win\src\Docker.Desktop\Engines\IsoConfig.cs:Line 82
Location Docker.Engines.IsoConfig.Write(Settings settings)Location C:\workspaces\stable-2.4.x\src\github.com\docker\pinata\win\src\Docker.Desktop\Engines\IsoConfig.cs:Line 40
Location Docker.Engines.LinuxHyperVEngine.<DoStartAsync>d__14.MoveNext()Location C:\workspaces\stable-2.4.x\src\github.com\docker\pinata\win\src\Docker.Desktop\Engines\LinuxHyperVEngine.cs:Line 57
...

How to solve

C:\Users\<username>\AppData\Roaming\Docker\settings.json

"overrideProxyExclude": null,

↓

"overrideProxyExclude": "",

• Reference
  • Docker fails to start after update on 2020-09-30 (today) · Issue #8724 · docker/for-win