Happ error “The subscription URL is not valid”
The app examined the address you pasted and would not even try it. No request was sent, so this tells you nothing about your service — the string itself is malformed, usually by a character that should not be there.
Getting a clean subscription address
Re-copying the address in a way that does not corrupt it.
- Copy with the button, not by hand
Manual selection tends to drop the last character or capture a trailing space — both invalidate the address.
- Do not route it through a chat
Messengers add formatting and sometimes shorten long links, and neither survives parsing.
- Check that it starts with a scheme
A subscription address begins with https:// or with a supported app scheme, never with a bare domain.
- Paste and import again
If a different message appears now, the address is accepted and the problem has moved on.
Why the app refuses it
Before making any request, Happ checks that the string is a well-formed address. This check is cheap and strict, and it fails on things a human eye reads straight past.
The most common causes, all of which look identical on screen:
- a space at the end, picked up when the text was selected by hand;
- a missing last character, for the same reason;
- text pasted from a chat that carried formatting marks with it;
- a description accidentally included along with the link — “here is your link:
https://…” pasted whole; - a bare domain with no
https://in front of it.
What it does not mean
It does not mean your subscription is dead, expired or blocked. Those conditions can only be discovered by asking the server, and no request was made here. The same address, copied cleanly, will normally import without complaint.
It also does not mean you need a new link from your provider. Ask for one only after a clean copy has failed twice — otherwise you will be issued a fresh address and hit exactly the same problem with it.
After a clean copy
If the message changes, you have moved on to a later stage and the new wording is what matters. Unknown content type means the address works but points at something that is not a subscription — most often a web dashboard. A timeout means the server simply did not answer in time. Both are covered in the list of messages.
Frequently asked questions
The link looks completely normal to me.
A trailing space, a missing final character or an invisible formatting mark from a chat app are all invisible on screen and all enough to make the address invalid.
Could my provider have changed the address?
Possibly, but a changed address would usually still be a valid one and fail later, with a different message. This error fires before any request.
Does this mean my subscription expired?
No. Expiry cannot be detected without contacting the server, and the app never got that far.
Trial access: in Telegram or in the web cabinet.