app works in "dev" but doesn't work in "preview"

[jaroslaw-weber]

Describe the bug

I get this error when clicking "see sample" button:

Uncaught TypeError: ({default:function ht(t){var n=ft(t.split(at));return n=mt(n),n.map(pt)}, [Symbol.toStringTag]:"Module"}) is not a function

Reproduction

https://github.com/jaroslaw-weber/frequency-flashcards

npm run dev

Then click "see sample" and it works correctly.

npm run preview

Then click "see sample" and it doesn't work and display error in the console

Logs

Uncaught TypeError: ({default:function ht(t){var n=ft(t.split(at));return n=mt(n),n.map(pt)}, [Symbol.toStringTag]:"Module"}) is not a function

System Info

System:
    OS: Windows 10 10.0.19043
    CPU: (4) x64 AMD Ryzen 3 3200G with Radeon Vega Graphics
    Memory: 5.90 GB / 15.95 GB
  Binaries:
    Node: 16.13.2 - C:\Program Files\nodejs\node.EXE
    npm: 8.1.2 - C:\Program Files\nodejs\npm.CMD
  Browsers:
    Edge: Spartan (44.19041.1266.0), Chromium (97.0.1072.62)
    Internet Explorer: 11.0.19041.1202

Severity

blocking all usage of SvelteKit

Additional Information

No response