Free mode subagents must run under an active freebuff session root.

[ryangsun]

这个是怎么回事呢？应该如何处理？

2026/05/13 06:05:23 [Freebuff2API] model registry: updated 6 agents, 2 models: [google/gemini-2.5-flash-lite google/gemini-3.1-flash-lite-preview]
2026/05/13 06:05:23 [Freebuff2API] listening on :8080
2026/05/13 06:05:25 [Freebuff2API] token-1: prewarmed researcher-web
2026/05/13 06:05:25 [Freebuff2API] token-1: prewarmed researcher-docs
2026/05/13 06:05:25 [Freebuff2API] token-1: prewarmed browser-use
2026/05/13 06:05:26 [Freebuff2API] token-1: prewarmed file-picker
2026/05/13 06:05:26 [Freebuff2API] token-1: prewarmed file-picker-max
2026/05/13 06:05:26 [Freebuff2API] token-1: prewarmed file-lister
2026/05/13 06:06:04 [Freebuff2API] [token-1] Routing request (model: google/gemini-2.5-flash-lite) via run: 810f0e33-153d-4e24-a07a-69399e4bdb3f
2026/05/13 06:06:05 [Freebuff2API] [token-1] upstream error response: {"error":"free_mode_invalid_agent_hierarchy","message":"Free mode subagents must run under an active freebuff session root."}
2026/05/13 06:07:06 [Freebuff2API] [token-1] Routing request (model: google/gemini-3.1-flash-lite-preview) via run: 2cf50137-2132-40e8-8ec7-c12aacb165cc
2026/05/13 06:07:06 [Freebuff2API] [token-1] upstream error response: {"error":"free_mode_invalid_agent_hierarchy","message":"Free mode subagents must run under an active freebuff session root."}