Happ error messages, one by one

All eight messages

Message	What it is telling you
Clipboard is empty	The app read the clipboard and found nothing to import.
The subscription URL is not valid	The address itself is malformed — before any request is made.
Configuration {config type} is not valid	A single configuration was recognised by protocol but could not be parsed.
JSON (or array) configuration is not valid	The data is JSON, but not JSON the app can use.
Invalid deeplink URL	A happ:// link the app does not recognise; it was ignored.
Unknown content type	The server answered, but the answer is not in any format the app handles.
Wrong data for import routing profile	A routing profile arrived with errors or unusable parameters.
Timeout while adding a subscription	No answer from the subscription server within nine seconds.

Which stage failed

The eight split cleanly into four groups, and knowing the group is usually enough to stop guessing.

Nothing left the app

Clipboard is empty and The subscription URL is not valid both happen before any network request. The app is looking at what you gave it and finding it unusable. Nothing about the server is known yet.

A request went out and came back wrong

Unknown content type means the server replied with something the app cannot classify. This is the message you get when the address points at a web dashboard rather than a subscription.

The data arrived but does not parse

Configuration … is not valid, JSON … is not valid and Wrong data for import routing profile all mean the app got approximately the right kind of thing and choked on its contents — usually a truncated string or characters that were not supposed to be there.

Timing

Timeout while adding a subscription means the server did not answer within nine seconds. That is a short window on a weak mobile connection, and it says nothing about whether the subscription itself is valid.

Invalid deeplink URL sits outside these — it concerns happ:// links, not subscriptions, and the app simply ignores what it cannot parse.

The one check worth doing first

Copy the link again, using the copy button your service provides rather than selecting the text by hand. This fixes more of these errors than anything else, and the reason is unglamorous: hand-selection routinely drops the last character or picks up a trailing space, and both produce a malformed address that looks perfectly fine on screen.

Then paste it into the app directly rather than through an intermediate note or chat message. Messengers add invisible formatting and some of them shorten long links on the way.

What opening the link in a browser does and does not prove

You will find this advice everywhere: open your subscription link in a browser, and if you see a normal web page, you copied the wrong thing. That is not reliable.

Subscription servers commonly look at what is asking. A browser gets a readable page; the app gets configuration data. So a normal-looking page is the expected result for a perfectly good link, and treating it as a fault sends you looking for a different address that does not exist.

What the browser genuinely tells you:

• a subscription page belonging to your service — expected, nothing is wrong;
• a file downloading, or a wall of configuration text — also expected;
• a login form — this is the dashboard address, not the subscription one;
• an error code — inconclusive, since a one-off failure looks identical to a broken service. Try again before concluding anything.

The only real test of whether a subscription works is importing it into the app.

When none of the eight appear

If the subscription imported, servers are listed, and traffic still does not pass, you are past the import stage and these messages will not help. Check the two things that expire quietly: the subscription’s remaining time and its traffic allowance. Both end without any message in the app.

If it turns out your access simply ran out, renew it with whoever issued it.