appsettings.json: JSON validation failed: Expression must be of type 'object'

In a asp.net core I'm getting "appsettings.json: JSON validation failed: Expression must be of type 'object'" in the R# errors window.

JetBrains ReSharper 2021.3.3 Build 213.0.20220125.124455 built on 2022-01-25
ReSharper 2021.3.20220125.132224

Microsoft Visual Studio Professional 2019
Version 16.11.11
VisualStudio.16.Release/16.11.11+32228.343
Microsoft .NET Framework
Version 4.8.04084

Installed Version: Professional

ASP.NET and Web Tools 2019   16.11.106.23128
ASP.NET and Web Tools 2019

ASP.NET Web Frameworks and Tools 2019   16.11.106.23128
For additional information, visit https://www.asp.net/

Azure App Service Tools v3.0.0   16.11.106.23128
Azure App Service Tools v3.0.0

Azure Functions and Web Jobs Tools   16.11.106.23128
Azure Functions and Web Jobs Tools

Bundler & Minifier   2.8.396
Adds support for bundling and minifying JavaScript, CSS and HTML files in any project.

C# Tools   3.11.0-4.22108.8+d9bef045c4362fbcab27ef35daec4e95c8ff47e1
C# components used in the IDE. Depending on your project type and settings, a different version of the compiler may be used.

Common Azure Tools   1.10
Provides common services for use by Azure Mobile Services and Microsoft Azure Tools.

Extensibility Message Bus   1.2.6 (master@34d6af2)
Provides common messaging-based MEF services for loosely coupled Visual Studio extension components communication and integration.

JetBrains ReSharper 2021.3.3   Build 213.0.20220125.124455
JetBrains ReSharper package for Microsoft Visual Studio. For more information about ReSharper, visit http://www.jetbrains.com/resharper. Copyright © 2022 JetBrains, Inc.

Microsoft Azure Tools for Visual Studio   2.9
Support for Azure Cloud Services projects

Microsoft Continuous Delivery Tools for Visual Studio   0.4
Simplifying the configuration of Azure DevOps pipelines from within the Visual Studio IDE.

Microsoft JVM Debugger   1.0
Provides support for connecting the Visual Studio debugger to JDWP compatible Java Virtual Machines

Microsoft MI-Based Debugger   1.0
Provides support for connecting Visual Studio to MI compatible debuggers

Microsoft Visual Studio Tools for Containers   1.2
Develop, run, validate your ASP.NET Core applications in the target environment. F5 your application directly into a container with debugging, or CTRL + F5 to edit & refresh your app without having to rebuild the container.

Mono Debugging for Visual Studio   16.10.15 (552afdf)
Support for debugging Mono processes with Visual Studio.

NuGet Package Manager   5.11.0
NuGet Package Manager in Visual Studio. For more information about NuGet, visit https://docs.nuget.org/

OzCodePackage Extension   1.0
OzCodePackage Visual Studio Extension Detailed Info

ProjectServicesPackage Extension   1.0
ProjectServicesPackage Visual Studio Extension Detailed Info

Razor (ASP.NET Core)   16.1.0.2122504+13c05c96ea6bdbe550bd88b0bf6cdddf8cde1725
Provides languages services for ASP.NET Core Razor.

ResX Resource Manager   ResXManager
Manage localization of all ResX-based resources in one place. Shows all resources of a solution and lets you edit the strings and their localizations in a well-arranged data grid.

SQL Server Data Tools   16.0.62201.17150
Microsoft SQL Server Data Tools

TypeScript Tools   16.0.30526.2002
TypeScript Tools for Microsoft Visual Studio

Visual Basic Tools   3.11.0-4.22108.8+d9bef045c4362fbcab27ef35daec4e95c8ff47e1
Visual Basic components used in the IDE. Depending on your project type and settings, a different version of the compiler may be used.

Visual F# Tools   16.11.0-beta.21514.6+b6c2c4f53ea3a08fa603ea93d6d2f808a62a21d1
Microsoft Visual F# Tools

Visual Studio Code Debug Adapter Host Package   1.0
Interop layer for hosting Visual Studio Code debug adapters in Visual Studio

Visual Studio Container Tools Extensions   1.0
View, manage, and diagnose containers within Visual Studio.

Visual Studio Tools for Containers   1.0
Visual Studio Tools for Containers

VisualStudio.DeviceLog   1.0
Information about my package

VisualStudio.Mac   1.0
Mac Extension for Visual Studio

Xamarin   16.11.000.197 (d16-11@6934992)
Visual Studio extension to enable development for Xamarin.iOS and Xamarin.Android.

Xamarin Designer   16.11.0.47 (remotes/origin/d16-11@e0d612363)
Visual Studio extension to enable Xamarin Designer tools in Visual Studio.

Xamarin Templates   16.10.5 (355b57a)
Templates for building iOS, Android, and Windows apps with Xamarin and Xamarin.Forms.