npm build error with svelte: Plugin typescript: @rollup/plugin-typescript TS2307: Cannot find module 'X' or its corresponding type declarations

I am trying to build a component library with svelte. I tried to build it with:

npm build

I got the error message:

Plugin typescript: @rollup/plugin-typescript TS2307: Cannot find module './components/MyComponent.svelte' or its corresponding type declarations.

The components I want to export are in the index.tsx:

export { default as MyComponent } from "./components/MyComponent.svelte";

My tsconfig:

{"extends": "@tsconfig/svelte/tsconfig.json","include": ["src/**/*"],"exclude": ["node_modules/*", "__sapper__/*", "public/*"],"compilerOptions": {"target": "es2016","module": "esnext","outDir": "dist","strict": true,"moduleResolution": "node","esModuleInterop": true,"declaration": true,"skipLibCheck": true,"forceConsistentCasingInFileNames": true  },"importsNotUsedAsValues": "remove"}

My rollup.config.js:

import svelte from 'rollup-plugin-svelte';import resolve from 'rollup-plugin-node-resolve';import postcss from 'rollup-plugin-postcss';import peerDepsExternal from 'rollup-plugin-peer-deps-external';import json from '@rollup/plugin-json';import autoPreprocess from 'svelte-preprocess';import typescript from '@rollup/plugin-typescript';import nodeResolve from '@rollup/plugin-node-resolve';const pkg = require('./package.json');export default {  input: 'src/index.tsx',  output: [    {      file: pkg.main,      format: 'cjs',      sourcemap: false,    },    {      file: pkg.module,      format: 'esm',      sourcemap: false,    },  ],  plugins: [    json({ compact: true }),    svelte({      preprocess: autoPreprocess(),    }),    resolve(),    nodeResolve(),    typescript({ sourceMap: true, rootDir: './src' }),    peerDepsExternal(),    postcss({      extensions: ['.css'],    }),  ],};

Does anyone already had such a problem? Thanks in advance!