A focused troubleshooting guide for when Tabnine stops showing inline completions while you write Swift, covering the most common causes and their fixes.
You type Swift, and Tabnine gives you nothing. No grayed-out inline text, no chat, just silence.
This is one of the most common Tabnine complaints, and it almost always traces back to a small handful of causes rather than a deep bug.
The good news is that the fixes are quick once you know where to look. This guide walks them in order of likelihood.
Work through the steps top to bottom and stop when suggestions reappear. Most people are fixed within the first three checks.
Tabnine's full functionality, including chat and cloud-backed completions, generally requires you to be signed in. An expired or missing session is the number-one culprit.
Look for the Tabnine icon in the status bar or activity bar. If it indicates you are logged out, click it and complete the sign-in flow in the browser window that opens.
After authenticating, return to VS Code and give it a moment. Completions often resume within seconds of a successful login.
If you were signed in but suggestions still stopped, sign out and back in to refresh the session. Stale authentication tokens are a frequent, easily fixed cause.
On a fresh install or after a big project change, Tabnine needs time to initialize its model and index your files. During that window, suggestions can be sparse or absent.
Wait a minute or two, especially the first time you open a large Swift project. Watch the Tabnine status indicator for any loading or initializing state.
If you just installed the extension, reload the VS Code window once to make sure everything activated cleanly.
Patience fixes more of these cases than people expect. If completions never appear even after warm-up, move on to the next causes.
Inline suggestions occupy a shared slot in the editor, and only one extension can win it. If you have another AI completion tool installed, it may be suppressing Tabnine.
Open your Extensions list and look for other AI assistants or aggressive autocomplete extensions. Try disabling them temporarily to see if Tabnine's suggestions return.
You can also check VS Code's inline suggestion settings to confirm inline completions are enabled at the editor level.
Once you identify the conflict, decide which tool owns inline completions and disable the other for that workspace. Running two inline AI tools at once rarely works well.
Tabnine can be turned off per-language or per-workspace, and it is easy to have flipped this by accident.
Open settings and search for Tabnine. Confirm that completions are enabled globally and that Swift is not excluded.
Also check whether you disabled Tabnine for the current workspace at some point. Workspace-level overrides silently win over your global preference.
Re-enable it where needed, reload the window, and test again in a Swift file. This resolves a surprising number of it just stopped reports.
Sometimes suggestions are actually appearing, but the key you press to accept them is bound to something else — snippet expansion, indentation, or another extension.
Type a predictable Swift line and look very carefully for faint inline text. If it is there but Tab does nothing, this is your problem.
Open the keybindings and check what the Tab key does in your editor. Remap Tabnine's accept action to an unused key if there is a conflict.
After remapping, the suggestions you thought were missing will suddenly become usable. It is a subtle but common trap.
If you are on the cloud tier, Tabnine needs network access to its service. A corporate proxy, VPN, or firewall can block it and silently kill completions.
Confirm you have general internet connectivity, then check whether your organization restricts outbound connections that Tabnine relies on.
If you are behind a proxy, you may need to configure proxy settings so the extension can reach its endpoints. Your network team can advise on the specifics.
For teams that cannot allow this traffic at all, the self-hosted enterprise deployment is the real answer — it keeps everything inside your boundary.
When suggestions vanish and nothing above explains it, the extension itself may be in a bad state or out of step with the service.
Start by checking versions. Confirm both VS Code and the Tabnine extension are up to date, because an old extension can misbehave against the current backend and quietly stop producing completions.
Update the extension if a newer version is available, then reload the window. Version drift is an easy thing to overlook and a common cause of features that worked last month but not today.
If updating does not help, suspect corrupted local state. A clean reinstall — remove the extension, restart VS Code, reinstall the latest version — often clears whatever got into a bad state during a crash or interrupted update.
After reinstalling, sign in fresh and test in a simple Swift file before returning to your real project. Verifying on a minimal example separates an extension problem from something specific to one workspace or repository.
This reset is heavier than the earlier checks, which is why it comes last, but it reliably clears the stubborn cases that survive every lighter fix.
If you have worked through every cause and still see nothing, reset from a clean state. Uninstall the Tabnine extension, restart VS Code, and reinstall the latest version.
Check VS Code's Output or developer tools for Tabnine log messages, which often name the exact failure — authentication, network, or activation.
Make sure your VS Code and the Tabnine extension are both up to date, since old versions can misbehave against the current service.
If it still fails, consult Tabnine's official documentation and support channels with your log output in hand. And remember: even fully working, Tabnine only writes code — you still build and ship in Xcode.
As a final sanity check, try the same Swift file on a colleague's machine or a fresh VS Code profile. If completions work there, the problem is local to your setup rather than the extension or service, which narrows your search considerably.
And keep the fundamental in view: even once suggestions return, Tabnine only helps you author Swift. Building, signing, and submitting still run through Xcode and the Apple Developer Program.
The most common reasons are a lapsed sign-in, a conflicting completion extension, or a hijacked accept keybinding. Check those first, in that order.
Yes. Inline suggestions share a single editor slot, so two AI completion tools will conflict. Disable one for the workspace to let the other work.
On the cloud tier, yes. A firewall, VPN, or proxy can block it. Configure proxy settings or use a self-hosted deployment if your network restricts the traffic.
Your Tab key is likely bound to snippets or indentation instead of accepting the suggestion. Remap Tabnine's accept action to an unused key in your keybindings.
Uninstall the extension, restart VS Code, reinstall the latest version, and sign in again. Check the Output logs for specific error messages if it still fails.