Failed to parse argument

I get this issue too.

My Format call

ReturnData.ItemNameAsText = FText::Format(FText::FromString(“{MatName} {ItemName}”), MaterialName, InvInterface->GetNameAsText());

The Warning I get

LogText:Warning: Failed to parse argument “MatName” as a number (using “0” as a fallback). Please check your format string for errors: “{MatName} {ItemName}”

LogText:Warning: Failed to parse argument “ItemName” as a number (using “1” as a fallback). Please check your format string for errors: “{MatName} {ItemName}”.

what I’m plugging into MatNAme and ItemName are already FText, so it’s incorrectly converting them to a number and causing the warning, but it displays the text correctly nevertheless.