Hey @alex

redirecting homepage to "/about/" will cause an error. Refreshing the page will fix the issue.
Entering the page again it won't work unless you refresh the page.

Any idea what's wrong there?

you can try on my instance in incognito page:
https://bassam.social/

Open it, it'll show an error. Refresh the page, and it'll work just fine.
Open it again, it'll display an error.