What if the LINE bottom menu won't open the LIFF page?

Troubleshooting when clicking the Rich Menu at the bottom of the LINE chat shows "Cannot open page. Check your network connection and try again."

LINELIFF

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Answer

When chatting with the DodoAI official account on LINE, tapping "Menu" (Rich Menu four squares) at the bottom should open the LIFF page (YOYO, Me, Upgrade, My Space, etc.).

If you see the native LINE message "Cannot open page. Check your network connection and try again.", it is usually a LIFF configuration or Rich Menu link issue, not your phone's network.

Common causes

Cause	Description
LIFF_ID not configured	line-api online ENV missing `LIFF_ID`; Rich Menu cannot generate correct `liff.line.me` deep links
Rich Menu still on old links	Menu was provisioned with ngrok / test LIFF ID; production was not re-provisioned
Wrong LIFF Endpoint	LINE Console Endpoint set to `https://app.dodoai.jp/liff` (extra `/liff`) → requests `/liff/liff/…` and fails
Wrong Endpoint domain	Points to line-api domain instead of `https://app.dodoai.jp`

Ops fix steps (production)

Self-check API (browser or curl)
GET https://<line-api-domain>/api/line-messaging-status
Confirm:
- liffIdConfigured is true
- liffAppOrigin is https://app.dodoai.jp
- richMenuSampleUrls links look like https://liff.line.me/{LIFF_ID}/liff/yoyo
Admin online ENV (service ai-dodoai-line-api)
- Set LIFF_ID (LINE Developers → LIFF app ID)
- Confirm LIFF_CHANNEL_ID
- ALLOWED_WEB_ORIGINS includes https://app.dodoai.jp and https://liff.line.me
LINE Developers Console (same Messaging API Channel)
- LIFF → Endpoint URL: https://app.dodoai.jp (root domain only, no /liff suffix)
- Scopes include profile, openid

Re-provision Rich Menu (after LIFF_ID is set)

cd ai-dodoai-line-api
npm run rich-menu:provision -- --image ./assets/rich-menu-4.png

Redeploy ai-dodoai-line-api and ai-dodoai-app; in LINE close chat and re-enter or re-follow to refresh menu cache.

What users can try

Close the LIFF window, return to chat, tap "Menu" again
Update LINE to the latest version
If it still fails, tell support which square failed and when, for line-messaging-status checks

Answer

Common causes

Ops fix steps (production)

What users can try

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