Method not found using StackExchange.Redis

Question

I'm trying to implement Redis caching in our sitecore setup, but I'm having trouble doing so. We are running dotnet framwork 4.8 in a containerized setup. I've install StackExchange.Redis Nuget package version 2.7.27, and I'm trying to write to the cahce using db.StringSet(applicationCacheKeyEnum.ToString(), objectJsonString, TimeSpan.MaxValue, true, When.Always);. My code compiles, but at runtime I get the following error:

{
"Message": "An error has occurred.",
"ExceptionMessage": "Method not found: 'Boolean StackExchange.Redis.IDatabase.StringSet(StackExchange.Redis.RedisKey, StackExchange.Redis.RedisValue, System.Nullable`1<System.TimeSpan>, Boolean, StackExchange.Redis.When, StackExchange.Redis.CommandFlags)'.",
"ExceptionType": "System.MissingMethodException",
"StackTrace": "......"}

As far as I can see the signature of my method call matches Redis' StringSet() method, so I don't understand why this is happening. Below is the method in which I'm trying to set the cache value:

    public void AddToCache(ApplicationCacheKeyEnum applicationCacheKeyEnum, object theObject)
{
    IDatabase db = _redisAccessor.Redis.GetDatabase(0);
    string objectJsonString = JsonConvert.SerializeObject(theObject, Formatting.Indented);
    db.StringSet(applicationCacheKeyEnum.ToString(), objectJsonString, TimeSpan.MaxValue, true, When.Always);
}

Contents of Packages.Props:

<?xml version="1.0" encoding="utf-8"?>
<Project 
xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
<PropertyGroup>
    <PlatformVersion>10.3.0</PlatformVersion>
</PropertyGroup>
<ItemGroup>
    <PackageReference Update="Microsoft.AspNet.Mvc" 
Version="5.2.4" />
    <PackageReference Update="Microsoft.AspNet.Web.Optimization" 
Version="1.1.3" />
    <PackageReference Update="Microsoft.AspNet.WebApi.Client" 
Version="5.2.6" />
    <PackageReference Update="Microsoft.AspNet.Razor" 
Version="3.2.7" />
    <PackageReference Update="Microsoft.AspNet.WebPages" 
Version="3.2.7" />
    <PackageReference Update="Microsoft.AspNet.WebApi" 
Version="5.2.9" />
    <PackageReference Update="Microsoft.AspNet.WebApi.Core" 
Version="5.2.9" />
    <PackageReference Update="Microsoft.AspNet.WebApi.WebHost" 
Version="5.2.9" />
    <PackageReference Update="Microsoft.AspNet.WebApi.Cors" 
Version="5.2.6" />
    <PackageReference 
Update="Microsoft.CodeDom.Providers.DotNetCompilerPlatform" V 
ersion="3.6.0" />
    <PackageReference 
Update="Microsoft.CrmSdk.XrmTooling.CoreAssembly" 
Version="9.1.0.110" />
    <PackageReference 
Update="Microsoft.Extensions.Caching.StackExchangeRedis" 
Version="6.0.0.0" />
    <PackageReference 
Update="Microsoft.Extensions.Configuration.Abstractions" 
Version="6.0.0.0" />
    <PackageReference 
Update="Microsoft.Extensions.DependencyInjection" 
Version="6.0.0.0" />
    <PackageReference 
Update="Microsoft.Extensions.DependencyInjection.Abstractions" 
Version="6.0.0.0" />
    <PackageReference 
Update="Microsoft.Extensions.Logging.Abstractions" 
Version="6.0.1" />
    <PackageReference Update="Microsoft.Extensions.Http" 
Version="2.1.1" />
    <PackageReference 
Update="Microsoft.IdentityModel.Clients.ActiveDirectory" 
Version="4.5.0" />
    <PackageReference 
Update="Microsoft.IdentityModel.JsonWebTokens" Version="5.4.0" 
/>
    <PackageReference 
Update="Microsoft.IdentityModel.Protocols.OpenIdConnect" 
Version="5.3.0" />
    <PackageReference Update="Microsoft.IdentityModel.Protocols" 
Version="5.3.0" />
    <PackageReference Update="Microsoft.IdentityModel.Tokens" 
Version="5.4.0" />
    <PackageReference Update="Microsoft.Xrm.Client.2015" 
Version="7.0.1" />
    <PackageReference Update="Microsoft.Web.Infrastructure" 
Version="1.0.0" />

    <PackageReference Update="jose-jwt" Version="2.5.0" />
    <PackageReference Update="ExpressiveAnnotations" 
Version="2.9.6" />
    <PackageReference Update="RestSharp" Version="106.15.0" />
    <PackageReference Update="RestSharp" Version="105.1.0" />
    <PackageReference Update="Newtonsoft.Json" Version="13.0.1" 
/>
    <PackageReference Update="jose-jwt" Version="2.5.0"/>
    <PackageReference Update="ExpressiveAnnotations" 
Version="2.9.6"/>
    <PackageReference Update="FluentResults" Version="3.0.0" />
    
    <PackageReference Update="System.Text.Encodings.Web" 
Version="6.0.0.0" />
    <PackageReference Update="System.Memory" Version="4.5.2" />
    <PackageReference Update="System.IdentityModel.Tokens.Jwt" 
Version="5.4.0" />
    <PackageReference 
Update="System.Runtime.CompilerServices.Unsafe" Version="5.0.0" 
/>

    <PackageReference Update="Sitecore.Kernel" 
Version="$(PlatformVersion)" />
    <PackageReference Update="Sitecore.Mvc" 
Version="$(PlatformVersion)" />
    <PackageReference Update="Sitecore.ExperienceEditor" 
Version="$(PlatformVersion)" />
    <PackageReference Update="Sitecore.ExperienceEditor.Speak" 
Version="$(PlatformVersion)" />
    <PackageReference Update="Sitecore.Assemblies.Platform" 
Version="$(PlatformVersion)" />
    <PackageReference Update="Sitecore.ContentSearch" 
Version="$(PlatformVersion)" />
    <PackageReference Update="Sitecore.ContentSearch.Linq" 
Version="$(PlatformVersion)" />
    <PackageReference Update="Sitecore.ExperienceForms" 
Version="$(PlatformVersion)" />
    <PackageReference Update="Sitecore.ExperienceForms.Mvc" 
Version="$(PlatformVersion)" />
    <PackageReference Update="Sitecore.Logging" 
Version="$(PlatformVersion)" />
    <PackageReference Update="Sitecore.Services.Infrastructure" 
Version="$(PlatformVersion)" />
    <PackageReference Update="Sitecore.LayoutService" 
Version="9.0.310" />
    <PackageReference 
Update="Sitecore.Assemblies.SitecoreHeadlessServicesServer" 
Version="21.0.583" />
    <PackageReference Update="Sitecore.Framework.Conditions" 
Version="6.0.0" />
    <PackageReference 
Update="Sitecore.Framework.Rules.Abstractions" Version="6.0.0" 
/>

    <PackageReference Update="Helpfulcore.Caching" 
Version="1.0.1" />
    <PackageReference Update="Helpfulcore.Caching.Sitecore" 
Version="1.0.4" />
    <PackageReference Update="Helpfulcore.Caching.Sitecore.Core" 
Version="1.0.2" />

    <PackageReference Update="xWrap.Framework" Version="1.0.21" 
/>
    <PackageReference Update="xWrap.Mvc.Framework" 
Version="1.0.21" />

    <PackageReference Update="Configy" Version="1.0.0.0" />
    <PackageReference Update="Kamsar.WebConsole" 
Version="2.0.1.0" />
    <PackageReference Update="MicroCHAP" Version="1.2.2.2" />
    <PackageReference Update="Rainbow" Version="2.1.4.0" />
    <PackageReference Update="Rainbow.Storage.Sc" 
Version="2.1.4.0" />
    <PackageReference Update="Rainbow.Storage.Yaml" 
Version="2.1.4.0" />
    <PackageReference Update="Unicorn" Version="4.1.6.0" />
    <PackageReference Update="Unicorn.Roles" Version="4.1.6.0" 
/>
    <PackageReference Update="Unicorn.Users" Version="4.1.6.0" 
/>

    <PackageReference Update="MSTest.TestAdapter" 
Version="3.1.1"/>
    <PackageReference Update="MSTest.TestFramework" 
Version="3.1.1"/>
    <PackageReference Update="Moq" Version="4.20.69"/>
    <PackageReference Update="StackExchange.Redis" 
Version="2.7.27" />
</ItemGroup>
</Project>

In csproj file i have the following ItemGroup:

<ItemGroup>
    <PackageReference Include="Sitecore.Assemblies.Platform">
      <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>
      <PrivateAssets>all</PrivateAssets>
    </PackageReference>
    <PackageReference Include="Microsoft.AspNet.Mvc" />
    <PackageReference Include="Sitecore.Kernel" />
    <PackageReference Include="Sitecore.Mvc" />
    <PackageReference Include="StackExchange.Redis" />
  </ItemGroup>

Can anyone help me understand, what causes the error?