Web: New session created but first message cannot be sent (Path '//session/...' is not a routable path) #12840
Description
Description
In OpenCode Web, creating a new session succeeds, but the first message is never sent.
I only see POST /session in Network. No POST /session/{id}/message is sent afterward.
Console shows:
Uncaught (in promise) Error: Path '//session/ses_3bce84db7ffe2FH9YBwWwq0ERS' is not a routable path
at ...
at HTMLFormElement.handleSubmit (...)
This looks like a client-side routing bug (double slash route), and it interrupts the submit flow.
Actual behavior
- POST /session returns 200 OK with a valid session object.
- Then UI throws routing error Path '//session/...' is not a routable path.
- First prompt is not sent.
Expected behavior
After session creation, app should navigate to a valid route and send first message (POST /session/{id}/message).
Network evidence
POST http://127.0.0.1:4096/session response:
{
id: ses_3bce84db7ffe2FH9YBwWwq0ERS,
slug: cosmic-planet,
version: 1.1.53,
projectID: global,
directory: C:\Users\Administrator,
title: New session - 2026-02-09T15:49:12.392Z,
time: {
created: 1770652152392,
updated: 1770652152392
}
}
Additional notes - I did not select “new workspace / create worktree”.
- Problem seems to happen between session.create() success and route navigation, before prompt API call.
Plugins
oh-my-opencode
OpenCode version
1.1.53
Steps to reproduce
- Open web app.
- Go to new session view.
- Type a message and submit.
- Observe session creation request succeeds.
- Observe no message request is sent.
Screenshot and/or share link
No response
Operating System
Windows
Terminal
Windows Terminal