It’s just the automations page apparently. When I use the c shortcut to directly navigate to e.g. blueprints, that also works. However, if I go to a device and click on one of the automations the device is in, I get the same error. So also an individual automation won’t load.
The problem only occurs in my default browser (Arc). When I use a different browser, I can reach the automation page. I tried clearing the browser cache, cookies, etc. Didn’t help. Really odd, but I’m unblocked at least.
To solve the issue on iOS, Settings > General > Storage > Home Assistant.
Offload the app.
Tap reinstall.
I only needed to reaccept the permissions. I was still logged in, and now able to access automations again.