In DNN web.config add EavAppsCache appSettings key like this:
<add key="EavAppsCache" value="ToSic.Sxc.Dnn.DataSources.AppsCacheDnnFarm, ToSic.Sxc.Dnn.Enterprise" />
The resulting appSettings will look a bit like this:
<appSettings>
<add key="InstallTemplate" value="DotNetNuke.install.config" />
<add key="AutoUpgrade" value="true" />
<add key="UseInstallWizard" value="true" />
<add key="InstallMemberRole" value="true" />
<add key="ShowMissingKeys" value="false" />
<add key="EnableCachePersistence" value="false" />
<add key="HostHeader" value="" />
<!-- Host Header to remove from URL so "www.mydomain.com/johndoe/Default.aspx" is treated as "www.mydomain.com/Default.aspx" -->
<add key="RemoveAngleBrackets" value="false" />
<!--optionally strip angle brackets on public login and registration screens-->
<add key="PersistentCookieTimeout" value="0" />
<!--use as persistent cookie expiration. Value is in minutes, and only active if a non-zero figure-->
<!-- set UsePortNumber to true to preserve the port number if you're using a port number other than 80 (the standard)
<add key="UsePortNumber" value="true" /> -->
<!-- Services Framework Tracing is primarily useful for developing and debugging -->
<add key="EnableServicesFrameworkTracing" value="false" />
<add key="UpdateServiceUrl" value="http://update.dotnetnuke.com" />
<add key="PreserveLoginUrl" value="true" />
<add key="loginUrl" value="~/Login.aspx" />
<add key="ValidationSettings:UnobtrusiveValidationMode" value="None" />
<add key="ImprovementProgram.Endpoint" value="https://dnnapi.com/beacon" />
<add key="InstallationDate" value="1/17/2020" />
<add key="Services.Endpoints.Registry" value="https://dnnapi.com/registry" />
<add key="InstallVersion" value="09.04.04" />
<add key="EavAppsCache" value="ToSic.Sxc.Dnn.DataSources.AppsCacheDnnFarm, ToSic.Sxc.Dnn.Enterprise" />
</appSettings>