DeepSeek PC stuck offline: clear local cache (2026)
If chat.deepseek.com works in a browser but the desktop app stays offline, treat it as a local session issue.
Fully quit the app, clear its cache folder, then relaunch and sign in again.
Disable VPN or corporate proxy briefly to see whether the app’s network path differs from the browser.
Update to the latest desktop build before reinstalling; old clients fail TLS checks more often.
After login, send a one-line prompt as a smoke test before opening long threads.
Change one variable at a time and confirm what actually helped.
If a company policy is involved, rule that out before chasing client settings.
Write the working steps into a short checklist for next time.
Export or screenshot a good setup so reinstalls are faster.
If it still flakes, retest on a clean network such as phone hotspot.