Module not found: Error: Can't resolve '@vue/composition-api/dist/vue-composition-api.mjs' in

This error message typically occurs when the Vue Composition API module cannot be found or resolved by the webpack bundler.

To resolve this issue, you can try the following steps:

1. Ensure that the `@vue/composition-api` package is installed in your project. You can install it using the following command:

   npm install @vue/composition-api

2. Check that the module path is correct. The error message indicates that the module could not be found at `@vue/composition-api/dist/vue-composition-api.mjs`. Make sure that the path is correct and that the file exists in that directory.

3. If you are using Vue CLI, make sure that the plugin for Vue Composition API is installed and configured correctly. You can install it using the following command:

   vue add @vue/composition-api

This will add the necessary plugin configuration to your project.

4. If none of the above steps work, try deleting your `node_modules` folder and reinstalling all packages using the following command:

   rm -rf node_modules && npm install

This will ensure that all packages are installed correctly and that any cached files are cleared.

If the issue persists, you may need to seek additional support or consult the Vue Composition API documentation for further troubleshooting steps.