crashes during "Drawing map..."

[GekoCH]

When I lauch the programm via npm start i get this output. It has worked before but since a few days I get this error message:

[2022-05-07T11:53:17.810Z] [INFO] Loading configuration file: /root/Icantbelieveitsnotvaletudo/config.json
[2022-05-07T11:53:17.869Z] [INFO] Connecting to MQTT broker...
[2022-05-07T11:53:17.874Z] [INFO] Webserver running on port 3000
[2022-05-07T11:53:17.878Z] [INFO] Connected to MQTT broker.
[2022-05-07T11:53:27.881Z] [INFO] Drawing map...
/root/Icantbelieveitsnotvaletudo/lib/MapDrawer.js:169
                    drawLayer(layer.pixels[i], layer.pixels[i + 1], color.r, color.g, color.b, color.a);
                                                                          ^

TypeError: Cannot read property 'r' of undefined
    at /root/Icantbelieveitsnotvaletudo/lib/MapDrawer.js:169:75
    at Array.forEach (<anonymous>)
    at MapDrawer.draw (/root/Icantbelieveitsnotvaletudo/lib/MapDrawer.js:153:33)
    at Timeout._onTimeout (/root/Icantbelieveitsnotvaletudo/lib/MqttClient.js:104:42)
    at listOnTimeout (internal/timers.js:557:17)
    at processTimers (internal/timers.js:500:7)
npm ERR! code ELIFECYCLE
npm ERR! errno 1
npm ERR! i-cant-believe-its-not-valetudo@2021.12.0 start: `node app.js`
npm ERR! Exit status 1