UWP project compile error -- Framework resource extraction failed

We are getting a compile error we have no idea how to deal with. For some reason, even reverting our git branch to a previously successful commit did not resolve the issue.

I've included the message below and part of the UWP csproj file. Could anyone please shed some light on how to approach this?

C:\Users\User.nuget\packages\microsoft.net.uwpcoreruntimesdk\2.2.9\tools\CoreRuntime\Microsoft.Net.CoreRuntime.targets(195,9): error : Framework resource extraction failed. This .resources file should not be read with this reader. The resource reader type is "System.Resources.Extensions.DeserializingResourceReader, System.Resources.Extensions, Version=4.0.0.0, Culture=neutral, PublicKeyToken=cc7b13ffcd2ddd51".

<?xml version="1.0" encoding="utf-8"?>
<Project ToolsVersion="14.0" DefaultTargets="Build" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
  <Import Project="$(MSBuildExtensionsPath)\$(MSBuildToolsVersion)\Microsoft.Common.props" Condition="Exists('$(MSBuildExtensionsPath)\$(MSBuildToolsVersion)\Microsoft.Common.props')" />
  <PropertyGroup>
    <Configuration Condition=" '$(Configuration)' == '' ">Debug</Configuration>
    <Platform Condition=" '$(Platform)' == '' ">x86</Platform>
    <ProjectGuid>{CA6DCE2D-8B74-4D5E-B411-6CE6CCDD6F00}</ProjectGuid>
    <OutputType>AppContainerExe</OutputType>
    <AppDesignerFolder>Properties</AppDesignerFolder>
    <RootNamespace>MyApp.NETCore.UWP</RootNamespace>
    <AssemblyName>MyApp.NETCore.UWP</AssemblyName>
    <DefaultLanguage>en-US</DefaultLanguage>
    <TargetPlatformIdentifier>UAP</TargetPlatformIdentifier>
    <TargetPlatformVersion>10.0.18362.0</TargetPlatformVersion>
    <TargetPlatformMinVersion>10.0.16299.0</TargetPlatformMinVersion>
    <MinimumVisualStudioVersion>14</MinimumVisualStudioVersion>
    <EnableDotNetNativeCompatibleProfile>true</EnableDotNetNativeCompatibleProfile>
    <FileAlignment>512</FileAlignment>
    <ProjectTypeGuids>{A5A43C5B-DE2A-4C0C-9213-0A381AF9435A};{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}</ProjectTypeGuids>
    <PackageCertificateKeyFile>MyApp.NETCore.UWP_TemporaryKey.pfx</PackageCertificateKeyFile>
    <GenerateAppInstallerFile>False</GenerateAppInstallerFile>
    <AppxAutoIncrementPackageRevision>False</AppxAutoIncrementPackageRevision>
    <AppxSymbolPackageEnabled>False</AppxSymbolPackageEnabled>
    <AppxBundle>Always</AppxBundle>
    <AppxBundlePlatforms>x64</AppxBundlePlatforms>
    <PackageCertificateThumbprint>D3FEA32C748C783A7D6A6A290C25E84228E8DD35</PackageCertificateThumbprint>
    <AppInstallerUpdateFrequency>1</AppInstallerUpdateFrequency>
    <AppInstallerCheckForUpdateFrequency>OnApplicationRun</AppInstallerCheckForUpdateFrequency>
  </PropertyGroup>

    <PackageReference Include="Xamarin.Forms" Version="4.3.0.908675" />