HTTP error 503 on cdn.apple-mapkit.com

I am using apple maps with leaflet and mapkitmutant.
The apple maps appear to be displayed correctly, but the browser console gets flooded with these error messages. "503 servie not available".

Any ideas on how to fix or suppress the error messages?

Could not read source map for https://cdn.apple-mapkit.com/mk/5.75.107/libs/mapkit.core.f63534.js: Unexpected 503 response from https://mw-ci1-mapkitjs.geo.apple.com/admin/source-maps/5.75.107/source-maps/libs/mapkit.core.f63534.js.map: getaddrinfo ENOTFOUND mw-ci1-mapkitjs.geo.apple.com