Looks like an issue with Picker and cors. I get the error only after loading the app on the browser but error is on server console.
W20210714-13:09:03.955(-5)? (STDERR) events.js:352
W20210714-13:09:03.955(-5)? (STDERR) throw er; // Unhandled 'error' event
W20210714-13:09:03.955(-5)? (STDERR) ^
W20210714-13:09:03.955(-5)? (STDERR)
W20210714-13:09:03.956(-5)? (STDERR) Error [ERR_STREAM_WRITE_AFTER_END] [ERR_STREAM_WRITE_AFTER_END]: write after end
W20210714-13:09:03.956(-5)? (STDERR) at writeAfterEnd (_http_outgoing.js:694:15)
W20210714-13:09:03.956(-5)? (STDERR) at ServerResponse.end (_http_outgoing.js:815:7)
W20210714-13:09:03.956(-5)? (STDERR) at imports/startup/server/endpoints/manifests.js:44:12
W20210714-13:09:03.956(-5)? (STDERR) at doCall (packages/meteorhacks_picker.js:128:14)
W20210714-13:09:03.956(-5)? (STDERR) at PickerImp._processRoute (packages/meteorhacks_picker.js:122:5)
W20210714-13:09:03.956(-5)? (STDERR) at PickerImp.Picker.constructor._processRoute (packages/montiapm:agent/lib/hijack/picker.js:29:31)
W20210714-13:09:03.956(-5)? (STDERR) at processNextRoute (packages/meteorhacks_picker.js:90:14)
W20210714-13:09:03.957(-5)? (STDERR) at processNextMiddleware (packages/meteorhacks_picker.js:78:7)
W20210714-13:09:03.957(-5)? (STDERR) at urlencodedParser (/home/wanchope/Proyectos/propiedata/propiedata-meteor/node_modules/body-parser/lib/types/urlencoded.js:91:7)
W20210714-13:09:03.957(-5)? (STDERR) at doCall (packages/meteorhacks_picker.js:140:16)
W20210714-13:09:03.957(-5)? (STDERR) at PickerImp._processMiddleware (packages/meteorhacks_picker.js:134:5)
W20210714-13:09:03.957(-5)? (STDERR) at processNextMiddleware (packages/meteorhacks_picker.js:76:12)
W20210714-13:09:03.957(-5)? (STDERR) at jsonParser (/home/wanchope/Proyectos/propiedata/propiedata-meteor/node_modules/body-parser/lib/types/json.js:110:7)
W20210714-13:09:03.957(-5)? (STDERR) at doCall (packages/meteorhacks_picker.js:140:16)
W20210714-13:09:03.957(-5)? (STDERR) at PickerImp._processMiddleware (packages/meteorhacks_picker.js:134:5)
W20210714-13:09:03.957(-5)? (STDERR) at processNextMiddleware (packages/meteorhacks_picker.js:76:12)
W20210714-13:09:03.958(-5)? (STDERR) at /home/wanchope/Proyectos/propiedata/propiedata-meteor/node_modules/cors/lib/index.js:221:17
W20210714-13:09:03.958(-5)? (STDERR) at origin (imports/startup/server/endpoints/api/v1/index.js:28:7)
W20210714-13:09:03.958(-5)? (STDERR) at /home/wanchope/Proyectos/propiedata/propiedata-meteor/node_modules/cors/lib/index.js:219:13
W20210714-13:09:03.958(-5)? (STDERR) at optionsCallback (/home/wanchope/Proyectos/propiedata/propiedata-meteor/node_modules/cors/lib/index.js:199:9)
W20210714-13:09:03.958(-5)? (STDERR) at corsMiddleware (/home/wanchope/Proyectos/propiedata/propiedata-meteor/node_modules/cors/lib/index.js:204:7)
W20210714-13:09:03.958(-5)? (STDERR) at doCall (packages/meteorhacks_picker.js:140:16)
W20210714-13:09:03.958(-5)? (STDERR) Emitted 'error' event on ServerResponse instance at:
W20210714-13:09:03.958(-5)? (STDERR) at writeAfterEndNT (_http_outgoing.js:753:7)
W20210714-13:09:03.958(-5)? (STDERR) at processTicksAndRejections (internal/process/task_queues.js:83:21) {
W20210714-13:09:03.958(-5)? (STDERR) code: 'ERR_STREAM_WRITE_AFTER_END'
W20210714-13:09:03.959(-5)? (STDERR) }
=> Exited with code: 1
=> Your application is crashing. Waiting for file change.