When I run

   b4 am -t 87y2s0olg6.wl-kuninori.morimoto.gx@renesas.com

it says:

| Grabbing thread from lore.kernel.org
| Analyzing 13 messages in the thread
| Found new series v1
| Will use the latest revision: v3
| You can pick other revisions using the -vN flag
| ---
| Writing ./v3_20200316_kuninori_morimoto_gx_renesas_com.mbx
|   ERROR: missing [1/6]!
|   ERROR: missing [2/6]!
|   ERROR: missing [3/6]!
|   ERROR: missing [4/6]!
|   ERROR: missing [5/6]!
|   ERROR: missing [6/6]!
| ---
| Total patches: 0
| ---

even though lore appears to have the full thread:

   https://lore.kernel.org/alsa-devel/87wo7kolfa.wl-kuninori.morimoto.gx@renesas.com/

Thanks,
Mark