prerender=true and ssr=false mix build wrong

[shynome]

Describe the bug

I build a site with static page and dynamic page both, this problem has broken dynamic pages

Reproduction

# select Skeleton project
npm create svelte@latest test
cd test
npm i
echo 'export const prerender = true;export const ssr = false;export async function load() {};' > src/routes/+layout.server.ts
npm run build
npm run preview -- --open 
# got 500, expect Skeleton default page

Logs

No response

System Info

System:
    OS: Linux 6.1 Debian GNU/Linux 12 (bookworm) 12 (bookworm)
    CPU: (16) x64 AMD Ryzen 7 5700G with Radeon Graphics
    Memory: 17.72 GB / 30.64 GB
    Container: Yes
    Shell: 5.2.15 - /bin/bash
  Binaries:
    Node: 18.17.1 - /usr/bin/node
    Yarn: 1.22.19 - /usr/bin/yarn
    npm: 9.6.7 - /usr/bin/npm
    pnpm: 7.18.0 - /usr/bin/pnpm
    bun: 1.0.2 - ~/.bun/bin/bun
  Browsers:
    Chrome: 119.0.6045.105
  npmPackages:
    @sveltejs/adapter-auto: ^2.0.0 => 2.1.1 
    @sveltejs/adapter-static: ^2.0.3 => 2.0.3 
    @sveltejs/kit: ^1.5.0 => 1.27.3 
    svelte: ^3.54.0 => 3.59.2 
    vite: ^4.0.0 => 4.5.0

Severity

blocking all usage of SvelteKit

Additional Information

I use +layout.server.ts to provide { navs: [ {name:"home",link: "/"} ] } for breadcrumb nav

src/routes/
├── +page.svelte
├── +layout.server.ts     # { navs: [ {name:"home",link: "/"] }
└── user
    ├── +layout.server.ts # { navs: [ {name:"home",link: "/"}, {name:"user center",link: "/user"}] }
    └── +page.svelte

[shynome]

miss generate /__data.json

[shynome]

#10332 the similar problem