nctalkchatbots TypeError: chat.getActordisplayname is not a function

[egargale]

On a Nextcloud (docker) 19.0.3 with Talk App. 9.04 nctalkchatbot is not working and crashes on any message in the chat . The error is the following:

nctalkchatbots | (node:19) UnhandledPromiseRejectionWarning: TypeError: chat.getActordisplayname is not a function
nctalkchatbots | at /app/main.js:232:38
nctalkchatbots | at ClientReadableStreamImpl. (/app/src/nextcloudTalkBot.js:22:45)
nctalkchatbots | at ClientReadableStreamImpl.emit (events.js:314:20)
nctalkchatbots | at addChunk (_stream_readable.js:307:12)
nctalkchatbots | at readableAddChunk (_stream_readable.js:282:9)
nctalkchatbots | at ClientReadableStreamImpl.Readable.push (_stream_readable.js:221:10)
nctalkchatbots | at Object.onReceiveMessage (/app/node_modules/@grpc/grpc-js/build/src/client.js:317:28)
nctalkchatbots | at Object.onReceiveMessage (/app/node_modules/@grpc/grpc-js/build/src/client-interceptors.js:287:182)
nctalkchatbots | at /app/node_modules/@grpc/grpc-js/build/src/call-stream.js:164:74
nctalkchatbots | at processTicksAndRejections (internal/process/task_queues.js:75:11)
nctalkchatbots | (node:19) UnhandledPromiseRejectionWarning: Unhandled promise rejection. This error originated either by throwing inside of an async function without a catch block, or by rejecting a promise which was not handled with .catch(). To terminate the node process on unhandled promise rejection, use the CLI flag --unhandled-rejections=strict (see https://nodejs.org/api/cli.html#cli_unhandled_rejections_mode). (rejection id: 6)

nctalkproxyd seems to work fine. It joins the chat rooms, read the messages and report to client

{"level":"info","timestamp":"2020-09-18T16:34:47Z","message":"starting server"},
{"level":"info","status":"joined room "admin" ("admin") with ID "9" and token "5wez9a79"","timestamp":"2020-09-18T16:34:51Z","message":"received Nextcloud client status"},
{"level":"info","status":"joined room "Talk updates ✅" ("jitsibot") with ID "14" and token "gd5qgjzr"","timestamp":"2020-09-18T16:34:51Z","message":"received Nextcloud client status"},
{"level":"info","status":"joined room "mytest4444" ("mytest4444") with ID "16" and token "ib5k2mfe"","timestamp":"2020-09-18T16:34:51Z","message":"received Nextcloud client status"},
{"level":"info","timestamp":"2020-09-18T16:34:51Z","message":"new client connected to service"},
{"level":"info","chat":{"id":212,"token":"ib5k2mfe","actorType":"users","actorId":"gargale","actorDisplayName":"Enrico Gargale","isReplyable":true,"message":"Prova di messaggio","messageParamertes":""},"timestamp":"2020-09-18T16:41:07Z","message":"writing chat from Nextcloud Talk to clients"},
{"level":"info","chat":{"id":213,"token":"ib5k2mfe","actorType":"users","actorId":"gargale","actorDisplayName":"Enrico Gargale","isReplyable":true,"message":"#meeting","messageParamertes":""},"timestamp":"2020-09-18T16:41:47Z","message":"writing chat from Nextcloud Talk to clients"},
{"level":"info","chat":{"id":214,"token":"ib5k2mfe","actorType":"users","actorId":"gargale","actorDisplayName":"Enrico Gargale","isReplyable":true,"message":"#chat","messageParamertes":""},"timestamp":"2020-09-18T16:42:25Z","message":"writing chat from Nextcloud Talk to clients"},

Below the docker-compose.yml for the services:

version: '3'
services:
    nctalkproxyd:
        image: pojntfx/nctalkproxyd
        container_name: nctalkproxyd
        restart: unless-stopped
        ports:
            - "1969:1969"
        volumes:
            - nctalkproxyd:/var/lib/nctalkproxyd
        environment:
            NCTALKPROXYD_DBPATH: "/var/lib/nctalkproxyd"
            NCTALKPROXYD_USERNAME: "jitsibot"
            NCTALKPROXYD_PASSWORD: "PASSWORD"
            NCTALKPROXYD_RADDR: "https://NEXTCLOUD.EXAMPLE.COM"
            NCTALKPROXYD_ADDRREMOTE: "https://NEXTCLOUD.EXAMPLE.COM"
        networks:
            - nctalkbots
    nctalkchatbots:
        container_name: nctalkchatbots
        restart: unless-stopped
        image: pojntfx/nextcloud-talk-bot-jitsi
        environment:
            NCTALKBOT_BOT_NAME: "jitsibot"
        networks:
            - nctalkbots
networks:ts 
    nctalkbots:
        external: true
volumes:
    nctalkproxyd:
        driver: local

Unsuccessful attempts for resolving the problem:

• Downgrade Nextcloud to ver. 18 latest
• Build the docker containers instead of using the docker hub images

Any hint would be appreciated. And thanks for the code.