New docker installation gives "Error: No user namespaces in registration"

[merkalev]

sudo docker run -v /matrix-appservice-discord:/data -p 9005:9005 halfshot/matrix-appservice-discord
Feb-17 10:56:22.589 [DiscordAS] error: A fatal error occurred during startup: Error: No user namespaces in registration
at new Appservice (/node_modules/matrix-bot-sdk/lib/appservice/Appservice.js:79:19)
at /src/discordas.ts:154:24
at Generator.next ()
at /build/src/discordas.js:8:71
at new Promise ()
at __awaiter (/build/src/discordas.js:4:12)
at run (/build/src/discordas.js:109:12)
at Object. (/src/discordas.ts:215:1)
at Module._compile (internal/modules/cjs/loader.js:1063:30)
at Object.Module._extensions..js (internal/modules/cjs/loader.js:1092:10)

Happened on a first install. (docker, os : yunohost, running conduit)

[cammelspit]

Same issue, Synapse on Unraid.