TypeError: de is undefined when selecting a link produced by <RouterLink>

[panta]

If I write the link by hand in the address bar, the router works, switching to the desired view, but
when selecting the link produced by:

<RouterLink to={{name: 'Widgets'}}>Widgets</RouterLink>

(which is equal to the one entered by hand) the URL changes, but the page doesn't and the console displays the error:

TypeError: de is undefined

in module.js:1:4303, which is minified (it has inside this extract ... if(ue.has(e))return;ue.add(e),de.c.push(()=>{ue.delete(e),s&&(n&& ...)

my package.json:

{
  "name": "svelte-app",
  "version": "1.0.0",
  "devDependencies": {
    "@fortawesome/fontawesome-free": "^5.10.2",
    "@spaceavocado/svelte-router": "^1.0.13",
    "bulma": "^0.7.5",
    "npm-run-all": "^4.1.5",
    "rollup": "^1.12.0",
    "rollup-plugin-babel": "^4.3.3",
    "rollup-plugin-commonjs": "^10.0.0",
    "rollup-plugin-livereload": "^1.0.0",
    "rollup-plugin-node-resolve": "^5.2.0",
    "rollup-plugin-postcss": "^2.0.3",
    "rollup-plugin-svelte": "^5.0.3",
    "rollup-plugin-terser": "^4.0.4",
    "svelma": "0.0.11",
    "svelte": "^3.0.0"
  },
  "dependencies": {
    "@babel/core": "^7.5.5",
    "sirv-cli": "^0.4.4"
  },
  "scripts": {
    "build": "rollup -c",
    "autobuild": "rollup -c -w",
    "dev": "run-p start:dev autobuild",
    "start": "sirv public --single",
    "start:dev": "sirv public --single --dev"
  }
}

[panta]

Closing because unrelated to svelte-router but to another library. Sorry for the inconvenient!