Problem with a DAX Query in DAX Studio

Hello Community,

I have a problem with the following DAX query. Later I would like to use it in Power Bi Report Builder, but first I need to have a working query.

In principle, if ALL is selected, it should perform the first calculation, if not then the second.

I always get the message :
8/21/2024 2:57:35 PM Query (34, 9) The expression refers to multiple columns. Multiple columns cannot be converted to a scalar value.

Unfortunately I can't find the error or I don't quite understand why.

Where is my error and how can I correct it?

This is my DAX Query.

DEFINE

VAR __DS0FilterJahrTable = 
    TREATAS({"2024"}, 'Datumstabelle'[Jahr])

VAR __DS0FilterMonatTable2 = 
    TREATAS({"April"}, 'Datumstabelle'[Monat])

VAR __DS0FilterSubscriptionsTable3 = 
		TREATAS(
			{"Test Subscription"},
			'dimAzSubscriptions'[subscriptionName])

VAR __DS0FilterTenantTable4 = 
		TREATAS({"Testtenant"}, 'dimAzTenants'[TenantName])

VAR __DS0FilterTable5 = 
		TREATAS({"ALL"}, 'dimAzTags'[Tagname])

VAR __DS0FilterTable6 = 
		TREATAS({"ALL"}, 'dimAzTags'[Valuename])

VAR __DS0Core = 
    IF (
         __DS0FilterTable5 = TRUE() && __DS0FilterTable6 = TRUE(),
        CALCULATETABLE(
            SUMMARIZECOLUMNS(
                'dimAzSubscriptions'[subscriptionName], 
                'dimAzResources'[Ressourcenname],
                "Azure Kosten", 'Measuretable'[Azure Kosten]
            ), 
            __DS0FilterJahrTable, __DS0FilterMonatTable2,  __DS0FilterSubscriptionsTable3, __DS0FilterTenantTable4
        ),
        CALCULATETABLE(
            SUMMARIZECOLUMNS(
                'dimAzSubscriptions'[subscriptionName], 
                'dimAzResources'[Ressourcenname],
                "Azure Kosten", 'Measuretable'[Azure Kosten]
            ), 
            __DS0FilterJahrTable, __DS0FilterMonatTable2,  __DS0FilterSubscriptionsTable3, __DS0FilterTenantTable4, __DS0FilterTable5, __DS0FilterTable6
        )
    )

EVALUATE __DS0Core

Many thanks in advance.

Best regards