Im having an issue trying to display a portal report in SAIL.

Im having an issue trying to display a portal report in SAIL.
I have a column in my portal report for assignee which may contain multiple entries and it displays fine when viewing my report in designer.
However, when I am trying to display the portal report in my SAIL code, I cannot get the multiple assignees to be displayed.
I am trying to display the portal report in a gridField and have the particular SAIL code to display the assignees is here:

a!gridTextColumn(
label: "Assignee",
data: if(
local!datasubset.totalCount = 0,
{},
local!datasubset.data[4].cells.value
)
)

The error that I get is:

Interface Definition: Expression evaluation error at function a!gridField [line 38]: A grid component [label=“”] has an invalid value for “columns” and “value”. All “data” arrays must not contain more items than the specified “batchSize”, but “batchSize” was 20 and the largest ...

OriginalPostID-143743