Troubleshooting · Corner help

Mac: “Apple could not verify Corner”

Beta builds aren't signed with an Apple developer certificate yet, so Gatekeeper stops them the first time. It's expected, and you only get past it once:

Click Done in the warning. Don't move Corner to the Bin.
Open System Settings > Privacy & Security and scroll to the bottom. Next to “Corner was blocked”, click Open Anyway.
Confirm with your password or Touch ID, then click Open Anyway once more.

No Open Anyway button? Open Terminal, run this line, then open Corner again:

xattr -cr /Applications/Corner.app

It removes the “downloaded from the internet” flag from Corner and nothing else.

Windows: “Windows protected your PC”

SmartScreen shows this for installers it doesn't know yet, and beta builds aren't signed. Click More info, check that the app is Corner-Setup-0.1.0-x64.exe, then click Run anyway. The installer needs no admin rights.

Mac: the Keychain prompt

When you install a newer build over an old one, macOS may ask:

Corner wants to use your confidential information stored in “Corner Safe Storage” in your keychain.

Enter your Mac login password and click Always Allow. Corner waits at startup until you answer. The prompt appears because macOS sees each unsigned build as a different app. Signed builds will stop it.

Clicked Deny? Then Corner can't unlock its database, and it shows “Corner cannot start: The encrypted database could not be opened” instead of starting without protection. Nothing is lost. Open Corner again and choose Always Allow.

The card doesn't show up

That's usually one of these, in order of likelihood:

Nothing is due. Open Today. If it's empty, nobody is waiting on you. Nice.
Nudges are paused. The tray icon shows a pause sign. Tray menu > Resume nudges.
It's outside your working hours or inside quiet hours. Check Settings > Nudges. Your time zone is shown there.
You're on Gentle. Gentle never shows a card, only a count on the tray icon and one morning digest.
The daily cap is used up, or a card went away less than 20 minutes ago. The rest wait on Today.
It's on your other screen. The card appears on the display your mouse was on.

`Ctrl+Alt+N / ⌘⌥N` does nothing

Another app already uses that key combination, so Corner couldn't claim it. When that happens the card leaves out its key hint. Click Open chat on the card instead, or free up the combination in the other app and restart Corner.

Telegram: “asked us to slow down”

Telegram limits how fast any app may make requests, and tells it how long to wait when it's too fast. That's a FLOOD_WAIT, and it isn't an error on your account. Corner shows the wait as a countdown, like “Telegram asked us to slow down. You can try again in 1:05.”, or “Waiting 1:05” next to Telegram in the sidebar.

During sync, Corner waits out the time and carries on by itself. You don't need to do anything.
While signing in, wait for the countdown to finish, then try again. Retrying early doesn't help.

Sign in again means Telegram ended Corner's session, for example because it was removed under Settings > Devices on your phone. Go to Settings > Accounts, click Sign in again and scan the QR code.
Connection problem or “Could not reach Telegram” is usually the network. Check your connection; Corner catches up on what it missed once it's back.
“That password is not correct” at sign-in means the two-step verification password you set in Telegram, not your phone's code.

“AI paused”

“Anthropic rejected this key.” The key was revoked or mistyped on Anthropic's side. Paste a working one in Settings > AI and Corner picks up where it left off.
“AI paused (daily budget). It resumes tomorrow.” You hit your daily token budget. Raise it in Settings > AI > Daily budget, or wait. Nudges keep working on timing meanwhile.

With WhatsApp, Corner reads WhatsApp Web's page, and it checks that page every time it loads and every 10 minutes. If WhatsApp has changed something and Corner can't read it reliably, you get a calm banner that WhatsApp sync is paused, instead of wrong nudges. Your other channels keep working, and a fix ships as an update. If WhatsApp logged you out, scan its QR code again in the WhatsApp tab. You can also pause WhatsApp sync yourself in Settings.

Email: the password isn't accepted Coming

“The mail server did not accept that address and password” almost always means you need an app password, not your normal one. The steps per provider are on Getting started.
“IMAP access is switched off” means turning on IMAP in your mail settings, or asking your admin.
Outlook.com and Microsoft 365 won't take a password at all. They need “Sign in with Microsoft”, which comes later.

Corner opens the demo instead of my data

While the demo is running, opening Corner again just brings the demo to the front. Click Exit demo in the pill at the top, and Corner restarts into your own profile.

Send us your logs

When something goes wrong, the log helps us most. Go to Settings > About and click Open logs folder. Send the newest file, named like corner-2026-11-09.log, to Elmir or C.

Mac: ~/Library/Application Support/Corner/logs
Windows: %APPDATA%\Corner\logs

Logs never contain message text, passwords, keys, sessions or phone numbers, and they're never uploaded by themselves. Files older than 7 days are deleted. The demo keeps its own logs, and Open logs folder inside the demo opens those.

Found a security problem?

Please don't post it anywhere public. Tell Elmir privately, by reply to your invite or by email with the subject SECURITY: Corner, with your version (Settings > About), your system and the steps to reproduce. We answer within 3 working days.

Start over

Settings > About > Restart onboarding shows the setup again and keeps your data.
Settings > Privacy > Delete all data wipes everything and signs out of Telegram. See Privacy and data.