PowerUp Dev Dashboard: Collaborator search returns no results / Collaborators tab unusable

Trello
1

Hi. I’m developing a new Trello PowerUp and I’m unable to add a collaborator (my personal account) from the Dev Dashboard.

What I tried

  • Signed into Trello as the PowerUp owner and opened the Dev Dashboard → selected my PowerUp → Collaborators tab.
  • Typed several Trello usernames (plain username, not @), emails, and profile URLs — search returns no results for any term.
  • Tried in Chrome and Firefox, regular and private windows, with browser extensions disabled.
  • I’ve tested on a home network and a phone hotspot; no enterprise security is involved.
  • Collected browser console and network logs.

Observed behavior

  • Collaborators search returns zero results for any input.
  • In Chrome:
    • Browser console shows errors like:
      • “Client must be initialized before using this method” stack trace originating from Trello assets.
      • Preload warnings for powerup-edit-powerup-page*.js and missing network requests for that asset.
    • Network tab:
      • the script powerup-edit-powerup-page.*.js is not present (no request)
  • In Firefox:
    • Browser console shows errors like:
      • CORS / network failures for https://xp.atlassian.com/...
    • Network tab:
      • xp.atlassian endpoints show network/CORS failures.
      • the script powerup-edit-powerup-page.*.js is also not present here (no request)

Expected behavior

  • Searching a valid Trello username or email finds the user and allows me to add them as a collaborator.
  • The Dev Dashboard should load the collaborator UI assets without JS/network errors.

Environment

  • PowerUp name: TCard
  • Owner account: /u/grault_
  • Example username/profile I searched: [Grault or /u/grault]
  • Browsers tried: Chrome 145.0.7632.77 (64-bit), Firefox 147.0.4 (64-bit)
  • Networks tried: home ISP, phone hotspot
  • Time of reproduction (UTC): Sunday, February 22, 2026 10:54:04 PM

API checks I ran

What I need from Atlassian/Trello

  • Please confirm whether the Dev Dashboard is experiencing a partial outage or deploy issue that can cause the collaborator UI to fail.
  • If the UI is broken, can you add collaborator grault to my PowerUp (TCard) or advise a manual workaround?

I have logs from testing (from the console and the Network tab) but cannot upload them because I’m a “new user” (of the dev community, I guess).

Thanks. Any guidance is appreciated.