what does this error mean?

[sylviahuang123]

should enable cacheWarmer? Are there any effect if switch from true to false?
sudo[17801]: {"context":"Lock","dd":{"service":"node","version":"0.0.1"},"level":"error","message":"Cannot read properties of null (reading 'map')","stack":["TypeError: Cannot read properties of null (reading 'map')\n at CacheWarmerService.handleApiSettings (mx-api-service/src/crons/cache.warmer/cache.warmer.service.ts:278:32)\n at runNextTicks (node:internal/process/task_queues:60:5)\n at processTimers (node:internal/timers:509:9)\n at mx-api-service/node_modules/@multiversx/sdk-nestjs-common/src/decorators/lock.ts:18:21\n at Function.lock (mx-api-service/node_modules/@multiversx/sdk-nestjs-common/src/utils/locker.ts:24:7)\n at CacheWarmerService.descriptor.value (mx-api-service/node_modules/@multiversx/sdk-nestjs-common/src/decorators/lock.ts:16:7)"],"timestamp":"2023-11-03T08:20:00.491Z","value":{}}