Add troubleshooting section to README regarding automatic HTTPS upgra…

…des (#272)
Studiosity · Dec 12, 2024 · af986b5 · af986b5
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 * The headless option disabled is not compatible with exporting of the PDF.
 * If showing the devtools, the browser will halt resulting in a navigation timeout
 
+## Troubleshooting
+
+If you're generating files from a web server, starting with puppeteer version 22, chromium automatically upgrades all HTTP requests to HTTPS requests.  If your server is only expecting HTTP requests then adding `launch_args: ['--disable-features=HttpsUpgrades']` will prevent the automatic protocol conversion from occurring.
 
 ## Contributing