SELECT @ActualTableName = QUOTENAME( TABLE_NAME )
FROM INFORMATION_SCHEMA.TABLES
WHERE TABLE_NAME = @PassedTableName

DECLARE @sql AS NVARCHAR(MAX)
--SELECT @sql = 'SELECT COUNT(*) FROM [' + @ActualTableName + '];'

-- changed to this
SELECT @sql = 'SELECT COUNT(*) FROM ' + @ActualTableName + ';'

EXEC(@SQL)