'The Angular Type LifecycleStateManager fails to include the property 'ɵmod'."

I encountered an error after installing ngxs/devtools-plugin in my Angular 11 project and I'm not sure why it happened:

core.js:2124 Uncaught Error: Type LifecycleStateManager does not have 'ɵmod' property.
at getNgModuleDef (core.js:2124)
at recurse (core.js:24921)
at recurse (core.js:24932)
at recurse (core.js:24932)
at registerNgModuleType (core.js:24917)
at new NgModuleFactory$1 (core.js:25031)
at compileNgModuleFactory__POST_R3__ (core.js:28586)
at PlatformRef.bootstrapModule (core.js:28824)
at Module.zUnb (main.ts:11)
at __webpack_require__ (bootstrap:79)
angulartypescriptngxs

Answer №1

To resolve the issue, execute the command: npm ci

This solution was successful for my situation.

Answer №2

I encountered a similar issue in my own experience when utilizing a library that specified a different version of ngxs in their peerDependencies, specifically at the patch level. Resolving this involved ensuring that both the application and the library were using the exact same version.

In my scenario, my application was using:

"@ngxs/store": "3.7.2",

while the library had:

"@ngxs/store": "^3.7.0",

If you encounter this error, verify that the version of ngxs/devtools-plugin matches the version of ngxs/store in your project.

UPDATE: Ultimately, deleting the node_modules directory and running npm install resolved the issue caused by the mismatched patch version. However, discrepancies in ngxs versions (major/minor) between the library and the application have also resulted in similar errors in the past.

Answer №3

An issue arose stating that page.module is missing the 'ɵmod' property.

To resolve this, I deleted providers:[] from my page.module.ts.

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