Frame.io v4 completely broken in After Effects

My Frame.io account was just upgraded to v4 and I’m now unable to use Frame.io inside After Effects.

I’m on Windows 11 and I’ve updated to the latest version of After Effects 2026 v26.3 and see the legacy Frame.io review window in the review workspace. This old legacy window no longer works with my v4 Frame.io account - that I understand. Unfortunately going to Window > Frame.io V4 does absolutely nothing. No new windows are opened and I’m completely dead in the water.

Things I’ve tried so far:
Uninstall AE 2026, reinstall without retaining any previous settings - same issue

Start AE 2026 in safe mode - same issue

Control Panel > Credential Manager > completely deleted anything related to Adobe or Frame.io, restarted windows, launched AE 2026 - same issue