DAX Query - Blank Result from Query when both parameters have multiple values

When I run my paginated report and provide the parameters I get the following error:

DEFINE

// --- Normalise parameter delimiters: replace "," with "|" ---
VAR _Insurer =
    SUBSTITUTE(@Insurer, ",", "|")

VAR _InsuredName =
    SUBSTITUTE(@insuredName, ",", "|")

VAR _CorsairInsuredName =
    SUBSTITUTE(@CorsairInsuredName, ",", "|")

// --- Split parameters into tables using PATHITEM on cleaned strings ---
VAR InsurerList =
    SELECTCOLUMNS (
        ADDCOLUMNS (
            GENERATESERIES(1, PATHLENGTH(_Insurer), 1),
            "InsList", PATHITEM(_Insurer, [Value])
        ),
        "Insurer", [InsList]
    )

VAR InsuredNameList =
    SELECTCOLUMNS (
        ADDCOLUMNS (
            GENERATESERIES(1, PATHLENGTH(_InsuredName), 1),
            "InsName", PATHITEM(_InsuredName, [Value])
        ),
        "InsuredName", [InsName]
    )

VAR CorsairInsuredNameList =
    SELECTCOLUMNS (
        ADDCOLUMNS (
            GENERATESERIES(1, PATHLENGTH(_CorsairInsuredName), 1),
            "CorsInsName", PATHITEM(_CorsairInsuredName, [Value])
        ),
        "CorsairInsuredName", [CorsInsName]
    )

// --- Flags: only apply a filter if the parameter list is non-empty ---
VAR HasInsurerFilter           = COUNTROWS(InsurerList) > 0
VAR HasInsuredFilter           = COUNTROWS(InsuredNameList) > 0
VAR HasCorsairInsuredFilter    = COUNTROWS(CorsairInsuredNameList) > 0

// --- Apply parameter-aware filters to each source table ---
VAR CAClaimsFiltered =
    FILTER (
        'CAClaims',
        // Insurer filter (on CAClaims) if provided
        (NOT HasInsurerFilter
         || SUMX (
                InsurerList,
                INT(
                    CONTAINSSTRING(
                        'CAClaims'[Insurers],
                        [Insurer]
                    )
                )
            ) > 0
        )
        &&
        // Insured name filter (on CAClaims) if provided
        (NOT HasInsuredFilter
         || SUMX (
                InsuredNameList,
                INT(
                    CONTAINSSTRING(
                        'CAClaims'[Insured Name Simplification],
                        [InsuredName]
                    )
                )
            ) > 0
        )
    )

VAR CorsairFiltered =
    FILTER (
        'Corsair Policy Years',
        // Assured filter (on Corsair) if provided
        (NOT HasCorsairInsuredFilter
         || SUMX (
                CorsairInsuredNameList,
                INT(
                    CONTAINSSTRING(
                        'Corsair Policy Years'[Assured],
                        [CorsairInsuredName]
                    )
                )
            ) > 0
        )
    )

// --- Build the distinct union of insurers ---
VAR AllInsurers =
    DISTINCT (
        UNION (
            SELECTCOLUMNS(CAClaimsFiltered, "Insurers", 'CAClaims'[Insurers]),
            SELECTCOLUMNS(CorsairFiltered, "Insurers", 'Corsair Policy Years'[Insurers])
        )
    )

EVALUATE
AllInsurers
ORDER BY [Insurers]