Could not find module `@ember/application/deprecations` on Ember 4.1.1

[byteg]

After adding fastboot to my project I get the following error in my JS console:

Uncaught Error: Could not find module @ember/application/deprecationsimported fromember-cli-fastboot/services/fastboot at vendor-a63d82f2b38476b3b648450a5c71b1d4.js:13:31 at c (vendor-a63d82f2b38476b3b648450a5c71b1d4.js:13:96) at a.findDeps (vendor-a63d82f2b38476b3b648450a5c71b1d4.js:25:158) at c (vendor-a63d82f2b38476b3b648450a5c71b1d4.js:13:152) at a.findDeps (vendor-a63d82f2b38476b3b648450a5c71b1d4.js:25:158) at c (vendor-a63d82f2b38476b3b648450a5c71b1d4.js:13:152) at requireModule (vendor-a63d82f2b38476b3b648450a5c71b1d4.js:7:60) at s.get (vendor-a63d82f2b38476b3b648450a5c71b1d4.js:6461:153) at e._extractDefaultExport (vendor-a63d82f2b38476b3b648450a5c71b1d4.js:6501:128) at e.resolveOther (vendor-a63d82f2b38476b3b648450a5c71b1d4.js:6463:18)

[MelSumner]

👋 I'm also having this issue on a new app as well.

Error: Could not find module `@ember/application/deprecations` imported from `ember-cli-fastboot/services/fastboot`
    at missingModule (/var/folders/_3/kkhsd8kx2dz4khm6dqk9zqnr0000gq/T/broccoli-37700OMhKv9EU5pjJ/out-338-broccoli_merge_trees/assets/vendor/loader/loader.js:247:1)
    at findModule (/var/folders/_3/kkhsd8kx2dz4khm6dqk9zqnr0000gq/T/broccoli-37700OMhKv9EU5pjJ/out-338-broccoli_merge_trees/assets/vendor/loader/loader.js:258:1)
    at Module.findDeps (/var/folders/_3/kkhsd8kx2dz4khm6dqk9zqnr0000gq/T/broccoli-37700OMhKv9EU5pjJ/out-338-broccoli_merge_trees/assets/vendor/loader/loader.js:168:1)
    at findModule (/var/folders/_3/kkhsd8kx2dz4khm6dqk9zqnr0000gq/T/broccoli-37700OMhKv9EU5pjJ/out-338-broccoli_merge_trees/assets/vendor/loader/loader.js:262:1)
    at Module.findDeps (/var/folders/_3/kkhsd8kx2dz4khm6dqk9zqnr0000gq/T/broccoli-37700OMhKv9EU5pjJ/out-338-broccoli_merge_trees/assets/vendor/loader/loader.js:168:1)
    at findModule (/var/folders/_3/kkhsd8kx2dz4khm6dqk9zqnr0000gq/T/broccoli-37700OMhKv9EU5pjJ/out-338-broccoli_merge_trees/assets/vendor/loader/loader.js:262:1)
    at requireModule (/var/folders/_3/kkhsd8kx2dz4khm6dqk9zqnr0000gq/T/broccoli-37700OMhKv9EU5pjJ/out-338-broccoli_merge_trees/assets/vendor/loader/loader.js:24:1)
    at ModuleRegistry.get (/var/folders/_3/kkhsd8kx2dz4khm6dqk9zqnr0000gq/T/broccoli-37700OMhKv9EU5pjJ/out-338-broccoli_merge_trees/assets/addon-tree-output/ember-resolver/resolvers/classic/index.js:28:1)
    at Class._extractDefaultExport (/var/folders/_3/kkhsd8kx2dz4khm6dqk9zqnr0000gq/T/broccoli-37700OMhKv9EU5pjJ/out-338-broccoli_merge_trees/assets/addon-tree-output/ember-resolver/resolvers/classic/index.js:464:1)
    at Class.resolveOther (/var/folders/_3/kkhsd8kx2dz4khm6dqk9zqnr0000gq/T/broccoli-37700OMhKv9EU5pjJ/out-338-broccoli_merge_trees/assets/addon-tree-output/ember-resolver/resolvers/classic/index.js:124:1)
    at Class.resolve (/var/folders/_3/kkhsd8kx2dz4khm6dqk9zqnr0000gq/T/broccoli-37700OMhKv9EU5pjJ/out-338-broccoli_merge_trees/assets/addon-tree-output/ember-resolver/resolvers/classic/index.js:185:1)
    at resolve (/var/folders/_3/kkhsd8kx2dz4khm6dqk9zqnr0000gq/T/broccoli-37700OMhKv9EU5pjJ/out-338-broccoli_merge_trees/assets/@ember/-internals/container/index.js:954:1)
    at Registry.resolve (/var/folders/_3/kkhsd8kx2dz4khm6dqk9zqnr0000gq/T/broccoli-37700OMhKv9EU5pjJ/out-338-broccoli_merge_trees/assets/@ember/-internals/container/index.js:659:1)
    at Registry.resolve (/var/folders/_3/kkhsd8kx2dz4khm6dqk9zqnr0000gq/T/broccoli-37700OMhKv9EU5pjJ/out-338-broccoli_merge_trees/assets/@ember/-internals/container/index.js:662:1)
    at factoryFor (/var/folders/_3/kkhsd8kx2dz4khm6dqk9zqnr0000gq/T/broccoli-37700OMhKv9EU5pjJ/out-338-broccoli_merge_trees/assets/@ember/-internals/container/index.js:288:1)
    at instantiateFactory (/var/folders/_3/kkhsd8kx2dz4khm6dqk9zqnr0000gq/T/broccoli-37700OMhKv9EU5pjJ/out-338-broccoli_merge_trees/assets/@ember/-internals/container/index.js:345:1)
    at lookup (/var/folders/_3/kkhsd8kx2dz4khm6dqk9zqnr0000gq/T/broccoli-37700OMhKv9EU5pjJ/out-338-broccoli_merge_trees/assets/@ember/-internals/container/index.js:278:1)
    at Container.lookup (/var/folders/_3/kkhsd8kx2dz4khm6dqk9zqnr0000gq/T/broccoli-37700OMhKv9EU5pjJ/out-338-broccoli_merge_trees/assets/@ember/-internals/container/index.js:143:1)
    at Class.lookup (/var/folders/_3/kkhsd8kx2dz4khm6dqk9zqnr0000gq/T/broccoli-37700OMhKv9EU5pjJ/out-338-broccoli_merge_trees/assets/@ember/-internals/runtime/lib/mixins/container_proxy.js:81:1)
    at Object.patchFetchForRelativeURLs [as initialize] (/var/folders/_3/kkhsd8kx2dz4khm6dqk9zqnr0000gq/T/broccoli-37700OMhKv9EU5pjJ/out-338-broccoli_merge_trees/assets/survey-netlify/instance-initializers/setup-fetch.js:16:1)
    at /var/folders/_3/kkhsd8kx2dz4khm6dqk9zqnr0000gq/T/broccoli-37700OMhKv9EU5pjJ/out-338-broccoli_merge_trees/assets/@ember/engine/index.js:140:1
    at Vertices.each (/var/folders/_3/kkhsd8kx2dz4khm6dqk9zqnr0000gq/T/broccoli-37700OMhKv9EU5pjJ/out-338-broccoli_merge_trees/assets/dag-map.js:231:1)
    at Vertices.walk (/var/folders/_3/kkhsd8kx2dz4khm6dqk9zqnr0000gq/T/broccoli-37700OMhKv9EU5pjJ/out-338-broccoli_merge_trees/assets/dag-map.js:145:1)
    at DAG.each (/var/folders/_3/kkhsd8kx2dz4khm6dqk9zqnr0000gq/T/broccoli-37700OMhKv9EU5pjJ/out-338-broccoli_merge_trees/assets/dag-map.js:75:1)
    at DAG.topsort (/var/folders/_3/kkhsd8kx2dz4khm6dqk9zqnr0000gq/T/broccoli-37700OMhKv9EU5pjJ/out-338-broccoli_merge_trees/assets/dag-map.js:83:1)
    at App._runInitializer (/var/folders/_3/kkhsd8kx2dz4khm6dqk9zqnr0000gq/T/broccoli-37700OMhKv9EU5pjJ/out-338-broccoli_merge_trees/assets/@ember/engine/index.js:155:1)
    at App.runInstanceInitializers (/var/folders/_3/kkhsd8kx2dz4khm6dqk9zqnr0000gq/T/broccoli-37700OMhKv9EU5pjJ/out-338-broccoli_merge_trees/assets/@ember/engine/index.js:138:1)
    at Class._bootSync (/var/folders/_3/kkhsd8kx2dz4khm6dqk9zqnr0000gq/T/broccoli-37700OMhKv9EU5pjJ/out-338-broccoli_merge_trees/assets/@ember/application/instance.js:110:1)
    at /var/folders/_3/kkhsd8kx2dz4khm6dqk9zqnr0000gq/T/broccoli-37700OMhKv9EU5pjJ/out-338-broccoli_merge_trees/assets/@ember/engine/instance.js:70:1
    at initializePromise (/var/folders/_3/kkhsd8kx2dz4khm6dqk9zqnr0000gq/T/broccoli-37700OMhKv9EU5pjJ/out-338-broccoli_merge_trees/assets/rsvp.js:522:1)
    at new Promise (/var/folders/_3/kkhsd8kx2dz4khm6dqk9zqnr0000gq/T/broccoli-37700OMhKv9EU5pjJ/out-338-broccoli_merge_trees/assets/rsvp.js:1023:1)
    at Class.boot (/var/folders/_3/kkhsd8kx2dz4khm6dqk9zqnr0000gq/T/broccoli-37700OMhKv9EU5pjJ/out-338-broccoli_merge_trees/assets/@ember/engine/instance.js:70:1)
    at /Users/melaniesumner/Code/experiments/survey-netlify/node_modules/fastboot/src/ember-app.js:292:25
    at invokeCallback (/var/folders/_3/kkhsd8kx2dz4khm6dqk9zqnr0000gq/T/broccoli-37700OMhKv9EU5pjJ/out-338-broccoli_merge_trees/assets/rsvp.js:495:1)
    at publish (/var/folders/_3/kkhsd8kx2dz4khm6dqk9zqnr0000gq/T/broccoli-37700OMhKv9EU5pjJ/out-338-broccoli_merge_trees/assets/rsvp.js:478:1)
    at /var/folders/_3/kkhsd8kx2dz4khm6dqk9zqnr0000gq/T/broccoli-37700OMhKv9EU5pjJ/out-338-broccoli_merge_trees/assets/ember-testing/lib/ext/rsvp.js:19:1
    at invokeWithOnError (/var/folders/_3/kkhsd8kx2dz4khm6dqk9zqnr0000gq/T/broccoli-37700OMhKv9EU5pjJ/out-338-broccoli_merge_trees/assets/backburner.js:360:1)
    at Queue.flush (/var/folders/_3/kkhsd8kx2dz4khm6dqk9zqnr0000gq/T/broccoli-37700OMhKv9EU5pjJ/out-338-broccoli_merge_trees/assets/backburner.js:241:1)
    at DeferredActionQueues.flush (/var/folders/_3/kkhsd8kx2dz4khm6dqk9zqnr0000gq/T/broccoli-37700OMhKv9EU5pjJ/out-338-broccoli_merge_trees/assets/backburner.js:447:1)
    at Backburner._end (/var/folders/_3/kkhsd8kx2dz4khm6dqk9zqnr0000gq/T/broccoli-37700OMhKv9EU5pjJ/out-338-broccoli_merge_trees/assets/backburner.js:999:1)
    at Backburner._boundAutorunEnd (/var/folders/_3/kkhsd8kx2dz4khm6dqk9zqnr0000gq/T/broccoli-37700OMhKv9EU5pjJ/out-338-broccoli_merge_trees/assets/backburner.js:648:1)
    at processTicksAndRejections (internal/process/task_queues.js:95:5)
    ```

[Windvis]

It seems ember-cli-fastboot v2 isn't compatible with Ember 4+. This import path was deprecated and removed in Ember 4 which is the error message you see here.

I would try using the v3 beta of ember-cli-fastboot which seems to be tested against Ember 4.

[MelSumner]

@Windvis this resolved my issue- thanks for pointing it out, I'd pulled down the repo and was trying to figure out why I was getting an error message on an import path that was definitely not in the code I was looking at. 😆

[byteg]

Sorry for the stupid question but how can i install the v3 beta?

[Windvis]

@byteg You can just modify the version in you package.json file, but v3 has since been officially released so you can just update to that version instead. I think that should also be the new default if you run ember install ember-cli-fastboot.