<NME> StackExchange.Redis.Extensions.Core.csproj
<BEF> ﻿<Project Sdk="Microsoft.NET.Sdk">

  <!-- Assembly signing -->
  <PropertyGroup>
    <AssemblyOriginatorKeyFile>..\..\StackExchange.Redis.Extensions.Core.snk</AssemblyOriginatorKeyFile>
    <SignAssembly>true</SignAssembly>
    <Nullable>enable</Nullable>
  </PropertyGroup>

  <ItemGroup>
    <PackageReference Include="Microsoft.Extensions.Logging.Abstractions" Version="6.0.1" />
    <PackageReference Include="StackExchange.Redis" Version="2.5.61" />
    <PackageReference Include="Microsoft.SourceLink.GitHub" Version="1.1.1" PrivateAssets="All" />
  </ItemGroup>

  <!--  -->
  <ItemGroup Condition=" '$(TargetFramework)' == 'netcoreapp3.0' or  '$(TargetFramework)' == 'net461' or  '$(TargetFramework)' == 'net472'">
    <PackageReference Include="Microsoft.Extensions.Logging.Abstractions" Version="2.2.0" />
  </ItemGroup>
</Project>

<MSG> Another possible fix

<DFF> @@ -14,7 +14,7 @@
   </ItemGroup>
 
   <!--  -->
-  <ItemGroup Condition=" '$(TargetFramework)' == 'netcoreapp3.0' or  '$(TargetFramework)' == 'net461' or  '$(TargetFramework)' == 'net472'">
+  <ItemGroup Condition=" '$(TargetFramework)' == 'netstandard2.0' or '$(TargetFramework)' == 'net461' or '$(TargetFramework)' == 'net472'">
     <PackageReference Include="Microsoft.Extensions.Logging.Abstractions" Version="2.2.0" />
   </ItemGroup>
 </Project>

Another possible fix