Angular PWA on iOS 17: "Safari cant open the page."

Updated: 2023-10-16

Marco Molteni

If you have a working PWA, iOS 17 (and, as reported by some developers, 16.4) could start to show the following error:

Safari can't open the page.

The error was:
"FetchEvent.respondWith received an error: TypeError: Internal Error".

Sometimes the PWA (Home page link on the iPhone) won't show any information simply showing a blank page.

This seems to generated by an error in Angular AND WebKit (aka the engine behind Safari).

The Angular team and the WebKit team have already implemented the fixes on their side. The Angular team backported the fix in some old versions (15).

I don't know when the WebKit team will distribute their own fix, with iOS 17 it seems not fixed yet.

If you have urgency to fix the issue you can navigate the discussion in GitHub to see if some workarounds works for you.

If you can wait, just update your Angular version to integrate the bugfix and wait that Apple will deliver it's own fix.

References