Memory failure: While attempting to store a string, a string was found that was larger than the page

string length must less 32KB(32 * 1024 Byte). if the size of picture converted to base64 text is to larger, it should be split into small chunks.

following code domonstration load local image, convert to base64 and split to small chunk

(imagePath as text, optional splitLength as number) => 
let
    limitLength = splitLength ?? 30 * 1024, 
    base64Text = Binary.ToText(File.Contents(imagePath)), 
    base64Length = Text.Length(base64Text), 
    result = List.Generate(
        ()=>0, 
        each _ * limitLength <= base64Length, 
        each _ + 1, 
        each [index = _, substring = Text.Middle(base64Text, _ * limitLength, limitLength)]
    )
in
    result