Error Evaluating UI Expression

Hello.

I am getting the following error when attempting to import an excel workbook into Appian.

From the Interface screen (FYI... I do not have a Line 41)

Could not display interface. Please check definition and inputs. Interface Definition: Expression evaluation error at function a!fileUploadField [line 6]: Error in a!forEach() expression during iteration 1: Expression evaluation error at function a!multipleFileUploadField_getEvalFileName [line 41]: Unexpected number of parameters.

a!formLayout(
label: "Import Excel Details Report",
contents: {
a!sectionLayout(
contents: {
a!fileUploadField(
label: "File Upload",
labelPosition: "ABOVE",
value: ri!ExcelData,
saveInto: ri!ExcelData,
target: cons!Excel_imported_files_pointer,
fileNames: "Excel Data " & now() & " " & user(),
validations: {}
)
}
)
},
buttons: a!buttonLayout(
primaryButtons: {
a!buttonWidget(
label: "Import",
submit: true,
style: "PRIMARY"
)
},
secondaryButtons: {
a!buttonWidget(
label: "Cancel",
value: true,
saveInto: ri!cancel,
submit: true,
style: "NORMAL",
validate: false
)
}
)
)