Can't Get 128 to Generate

Whether I store the JS locally or reference it from a local drive, I can't get any type of CODE128 barcodes to generate. The first 2 barcodes look fine. The last one doesn't show anything, even when I use "CODE128", "CODE128 A", etc.

```HTML

Test Page

Barcode 3

JsBarcode("#barcode2", "9780199532179", {
format: "CODE39",
displayValue: true,
fontSize: 24,
lineColor: "#0cc"
});

Barcode 3

JsBarcode("#barcode3", "9780199532179", {
format: "CODE39",
displayValue: true,
fontSize: 20
});

```

Start by running the provided HTML example with JsBarcode 3.3.20, comparing the working CODE39 cases with the CODE128 case. Trace the CODE128 generation entry point and verify completion when the final example renders a visible barcode.

Written by the indexing model from the issue text.