Tablet sync error: Failed building server state

[d2r]

Looking for advice on next debugging steps:

I am running rmfakecloud from a docker container on a separate machine, fronted by an nginx proxy, using DNS records to direct the tablet toward the server.

The tablet requests

• /data/users/$USER/sync/root, which contains an ascii-encoded hash value, $HASH
• /data/users/$USER/sync/$HASH

Both requests are served with a 200 response. The sync immediately fails with a message on the tablet:

Failed building server state, you might need to update.

Tablet is running 3.7.0.1930
Server is running a docker image with v0.0.14
The user account is using sync 1.5

[Eeems]

#262