Bot crashes due to MondoDB error

Issue

The bot crashes right after startup, with the following error message:

/Users/.../code/discord-bot/node_modules/mongoose/lib/drivers/node-mongodb-native/collection.js:185
          callback(new MongooseError(message));
                   ^

MongooseError: Operation `Homeworks.find()` buffering timed out after 10000ms
    at Timeout.<anonymous> (/Users/.../code/discord-bot/node_modules/mongoose/lib/drivers/node-mongodb-native/collection.js:185:20)
    at listOnTimeout (node:internal/timers:556:17)
    at processTimers (node:internal/timers:499:7)