Imagine a typical morning: you open your browser, the Proton Pass extension icon looks fine, you click it — and instead of your vault you get an endless spinner or a message you have never seen before. With Proton Pass this happens for a handful of quite predictable reasons, and almost all of them are resolved within a few minutes if you move step by step instead of guessing.
Before changing anything, answer two questions. Does the problem appear on one device or on all of them at once? Did the app work before? If one computer signs in normally and another does not, look for the difference between them: app version, browser, network. If nothing works anywhere, check the shared factors: your account status, the internet connection and the health of Proton's services. This simple split saves most of the time spent on diagnostics.
Start with the internet connection
The least exciting cause is also the most common: the vault cannot load because the device has no stable connection. A Wi-Fi network that shows full bars can still fail to reach external servers — for example, when a captive portal is waiting for you to accept its terms, or when a hotel network blocks certain types of traffic. Open any website to confirm the connection really works.
A useful test is to switch networks: try a mobile hotspot instead of home Wi-Fi, or the other way around. If Proton Pass starts working on a different network, the problem is not the app but the original connection — a router setting, a provider restriction or a firewall rule. In that case the fix lives in the network, not in the vault.
Update Proton Pass and your browser
Proton Pass is updated frequently, and new versions sometimes require a matching version of the browser extension. If the extension was updated automatically but the desktop app was not — or vice versa — the two parts may stop understanding each other. Check for updates in your app store, in the browser's extension page and in the desktop client itself.
After updating, restart the browser completely: not just the tab, but the whole application, so that the new version of the extension loads from scratch. On phones, close the app from the task switcher and open it again. This small ritual resolves a surprising share of "broken" installations.
Proton Pass sign-in and session problems
Sometimes the vault is intact, but the session has expired. Most managers, including Proton Pass, lock the vault after a period of inactivity and ask for your master password again — this is protection, not a failure. If the app keeps asking you to sign in even after a correct password, check the system clock on the device: a wrong date and time can break secure connections and make valid sessions look invalid.
If you recently changed your Proton Account password, remember that the master password of your vault is the one tied to the account — the old one will no longer work, even if it is still saved somewhere in the browser's own password store.
Browser extension conflicts
If several extensions try to manage passwords at the same time, they compete for the same fields and menus. The classic symptom: autofill works on one site but not on another, or the Proton Pass popup opens and immediately closes. Temporarily disable other password-related extensions and check whether the behavior changes.
Also check that the extension has the permissions it needs. After a browser update, some permissions are reset, and the autofill function silently loses the ability to read forms. Open the extension's settings page and review what is enabled.
Autofill is not filling anything
When autofill misses a specific site, the cause is usually the site itself: unusual login forms, fields inside frames or inputs that appear only after you click something. Click into the username field first and then open the Proton Pass menu — this gives the extension the context it needs.
If autofill fails everywhere at once, the extension has probably lost access to the page content. Reload the page, restart the browser and, if the problem persists, remove and reinstall the extension — your vault lives on the server, so nothing is lost by doing this.
Sync issues between devices
Changes made on one device should appear on the others within seconds. If an item you edited on your phone still looks old on your laptop, first force a refresh: lock and unlock the vault, or sign out and back in. This pushes the app to request the current state from the server.
If only one device is out of step, it may be stuck on an old cached copy of the vault. The most reliable cure is a clean sign-in on that device. And if sync breaks for all devices at once, the reason is often on the service side — see the section below.
When the problem is on Proton's side
Even the best services have maintenance windows and occasional incidents. If every device and every network shows the same problem, and especially if the official status page confirms an issue, there is nothing to fix locally: the correct move is to wait, or to use an exported backup of your passwords if you have one.
This is also the moment to remember an old truth: keep a recovery plan. Recovery codes, a printed emergency kit or a second manager account can turn a stressful incident into a minor inconvenience.
If you would like to start from the beginning — create the account, install the app correctly and import your passwords in the right order — our home page gathers everything about Proton Pass, from sign-in basics to the full guides library. A fresh, careful setup prevents most of the problems described above before they ever appear.