CORS prevents embedding stencils

[LukeCarrier]

For example, exporting this diagram yields this error:

Exporting /assets/diagrams/p.r.comp.lang.php.ext.tideways.drawio#0 to /assets/diagrams/p.r.comp.lang.php.ext.tideways.drawio-0.svg
Launching browser via Puppeteer
Preparing a new page
Navigating to the exporter
Setting up browser timeout in 30000 microseconds
Rendering diagram
Browser: Rendering page 0 as svg
Browser: Synchronous XMLHttpRequest on the main thread is deprecated because of its detrimental effects to the end user's experience. For more help, check [https://xhr.spec.whatwg.org/.](https://xhr.spec.whatwg.org/)
Browser: Access to XMLHttpRequest at 'file:///home/runner/work/brain/brain/node_modules/drawio-export-puppeteer/stencils/aws3.xml' from origin 'null' has been blocked by CORS policy: Cross origin requests are only supported for protocol schemes: http, data, chrome, chrome-untrusted, https.
Browser: Failed to load resource: net::ERR_FAILED
Browser: error in loadStencilSet: stencils/aws3.xml JSHandle@error
Browser: Access to XMLHttpRequest at 'file:///home/runner/work/brain/brain/node_modules/drawio-export-puppeteer/stencils/aws3.xml' from origin 'null' has been blocked by CORS policy: Cross origin requests are only supported for protocol schemes: http, data, chrome, chrome-untrusted, https.
Browser: Failed to load resource: net::ERR_FAILED
Browser: error in loadStencilSet: stencils/aws3.xml JSHandle@error
Browser: Access to XMLHttpRequest at 'file:///home/runner/work/brain/brain/node_modules/drawio-export-puppeteer/stencils/aws3.xml' from origin 'null' has been blocked by CORS policy: Cross origin requests are only supported for protocol schemes: http, data, chrome, chrome-untrusted, https.
Browser: Failed to load resource: net::ERR_FAILED
Browser: error in loadStencilSet: stencils/aws3.xml JSHandle@error
Awaiting render result information
Result info yields bounds { x: 181, y: 20, width: 371, height: 370 } and scale 1
Closing the browser

The resulting SVG is missing the stencil's images: