I tried both with plain svelte and your template:
[plugin:vite:import-analysis] Failed to resolve import "../ui/InputTypes/CheckBox.svelte" from "node_modules/@fouita/form-editor/src/lib/utils/cmpsRegistry.js". Does the file exist?
/home/pm/Documents/github/svelte_fouita/node_modules/@fouita/form-editor/src/lib/utils/cmpsRegistry.js:7:23
5 | import Textarea from "../ui/InputTypes/Textarea.svelte";
6 | import Submit from "../ui/InputTypes/Submit.svelte";
7 | import Checkbox from "../ui/InputTypes/CheckBox.svelte";
| ^
8 | import Password from "../ui/InputTypes/Password.svelte";
9 | import Date from "../ui/InputTypes/Date.svelte";
at formatError (/home/pm/Documents/github/svelte_fouita/node_modules/vite/dist/node/chunks/dep-689425f3.js:39080:46)
at TransformContext.error (/home/pm/Documents/github/svelte_fouita/node_modules/vite/dist/node/chunks/dep-689425f3.js:39076:19)
at normalizeUrl (/home/pm/Documents/github/svelte_fouita/node_modules/vite/dist/node/chunks/dep-689425f3.js:58360:26)
at async TransformContext.transform (/home/pm/Documents/github/svelte_fouita/node_modules/vite/dist/node/chunks/dep-689425f3.js:58509:57)
at async Object.transform (/home/pm/Documents/github/svelte_fouita/node_modules/vite/dist/node/chunks/dep-689425f3.js:39317:30)
at async doTransform (/home/pm/Documents/github/svelte_fouita/node_modules/vite/dist/node/chunks/dep-689425f3.js:50043:29
Indeed, it should be Checkbox.svelte, not CheckBox
But then, I get a weird result on both Chromium and FF:

Bonne journée
I tried both with plain svelte and your template:
Indeed, it should be
Checkbox.svelte, not CheckBoxBut then, I get a weird result on both Chromium and FF:

Bonne journée