Let puppeteer wait for requests to finish

validata_ui/pdf_renderer.py

@@ -50,6 +50,9 @@ class BrowserlessPDFRenderer(PDFRenderer):
                 "printBackground": False,
                 "format": "A4",
             },
+            "gotoOptions": {
+                "waitUntil": "networkidle0",
+            },
         }
         log.info(
             "BrowserlessPDFRenderer.render: about to send a POST request to "