"A single value column cannot be determined" error in summary table

I have a table which contain duplicated date column(table 1).

I created Table 2 using 

Table 2 = SUMMARIZE(Table 1, Table 1[Date], "count", COUNT(Table 1[Date]))

So, Table 2 will have unique values for Date column. There are missing values in Date column.

Now, trying to create Table 3 to make the Date column continues and put the count column value will be taken from previous date for missing date.

Table3 = 
ADDCOLUMNS(
    CALENDAR(MIN(Table2[Date]), MAX(Table2[Date])),
    "count",
    LOOKUPVALUE(
        Table2[count],
        Table2[Date],
        MAXX(
            FILTER(Table2, Table2[Date] <= EARLIER([Date])),
            [Date]
        )
    )
)

But getting error: "A single value for column in table cannot be determined. This can happen when a measure formula refers to a column that contains many values without specifying an aggregation such as min, max, count, or sum to get a single result"

I assume that, this is because Table2 is a derived from Table1 where Date column contain duplicate values. 

Is there any way to fix this? Please let me know. Thanks in advance.