[FIX] PDF not rendering (#18956)

app/message-attachments/client/messageAttachment.js

@@ -42,10 +42,10 @@ async function renderPdfToCanvas(canvasId, pdfLink) {
 		loader.style.display = 'block';
 	}
 
-	const pdf = await pdfjsLib.getDocument(pdfLink);
+	const pdf = await pdfjsLib.getDocument(pdfLink).promise;
 	const page = await pdf.getPage(1);
 	const scale = 0.5;
-	const viewport = page.getViewport(scale);
+	const viewport = page.getViewport({ scale });
 	const context = canvas.getContext('2d');
 	canvas.height = viewport.height;
 	canvas.width = viewport.width;