Oh thanks @julian!
I didn't realise that, thanks for clarifying it!
All working now 🙂
The confirmation link looks valid (correct scheme, correct domain and no port number).
Still I am getting a page not found. What could cause this problem?
I am having the exact same problem. I am running version 2.8.6 with a PostgreSQL database. Where do I check for "the entry for confirm:<uuid>"?
Edit: Maybe my issue is slightly different: I checked the new user's account. The email address is actually marked as validated, even after the 404 response.