Issue with Loading Specific Font in InDesign UXP Plugin

InDesign
1

Hello,

I’m working on an InDesign plugin using UXP, and I’m running into an issue with loading a specific font. When I attempt to load it, I get the following error:

Error: The requested font family is not available.

However, I’ve found a workaround—if I set the desired font as the default font within the app before launching the plugin, it loads successfully without any errors.

Has anyone encountered this issue or found a more efficient solution?

Here is some of my code:

function getOrCreateStyle(name, styleGroupName, styleProperties) {
	let paragraphStyle = thisDocument.paragraphStyles.itemByName(name);
	if (!paragraphStyle.isValid) {
		console.log(`Creating paragraph style "${name}" because it doesn't exist`);
		let styleGroup = getOrCreateStyleGroup(styleGroupName);
		if (styleGroup.isValid) {
			let styleName = thisDocument.paragraphStyleGroups.itemByName(styleGroupName).paragraphStyles.itemByName(name);
			if (!styleName.isValid) {
				paragraphStyle = thisDocument.paragraphStyleGroups.itemByName(styleGroupName).paragraphStyles.add({
					name: styleProperties.name,
					appliedFont: styleProperties.appliedFont,
					fontStyle: styleProperties.fontStyle,
					pointSize: styleProperties.pointSize,
					leading: styleProperties.leading,
					tracking: styleProperties.tracking,
					spaceAfter: styleProperties.spaceAfter,
					spaceBefore: styleProperties.spaceBefore,
					justification: styleProperties.justification,
					fillColor: getCreateOrModifyColor(styleProperties.fillColor.name, styleProperties.fillColor.colorValue),
				});
			}
			return styleName;
		}
	} else {
		return paragraphStyle;
	}
}

let SubheadlineParagraphStyleProperties = {
			name:"Subheadline",
			appliedFont:"Avenir LT Std",
			fontStyle:"85 Heavy",
			justification: Justification.LEFT_ALIGN,
			pointSize:12,
			leading:17,
			tracking:20,
			spaceAfter:0,
			spaceBefore:0,
			fillColor: {
				name: "Gray",
				colorValue: [62,53,48,19]
			}
		}

try {
				subHeadlineTextbox.paragraphs.item(1).appliedParagraphStyle = getCreateOrModifyStyle("Subheadline", "Sub Styles", SubheadlineParagraphStyleProperties);
			} catch (error) {
				console.log('Error: ', error);
			}
2

Try remove fontStyle property and add it to appliedFont separed by “\t”:

properties.appliedFont += "\t"+properties.fontStyle;