Inside docker: TypeError: basePath?.replace is not a function

[chlyNiklas]

I have started a Project with sveltekit, drizzle and Auth.js. Every thing works great! Except if i try to run inside a docker container!
It works when i run the development server and even if i build and then run the preview using pnpm run preview.

When i run it using docker and try to open the page i get following error:

[500] GET /
TypeError: basePath?.replace is not a function
    at createActionURL (file:///app/server/chunks/hooks.server-BNOT9et-.js:7667:45)
    at auth (file:///app/server/chunks/hooks.server-BNOT9et-.js:7876:22)
    at event.locals.auth (file:///app/server/chunks/hooks.server-BNOT9et-.js:7924:35)
    at getSession (file:///app/server/chunks/auth-C-mIEmci.js:10:38)
    at load (file:///app/server/chunks/0-CC_h7eAc.js:8:25)
    at file:///app/server/chunks/index-BFjh8zCx.js:3128:20
    at AsyncLocalStorage.run (node:internal/async_local_storage/async_context_frame:63:14)
    at with_request_store (file:///app/server/chunks/event-ByDKS2H7.js:35:20)
    at fn (file:///app/server/chunks/index-BFjh8zCx.js:3126:29)
    at record_span (file:///app/server/chunks/index-BFjh8zCx.js:2635:12)

here is a link to my repo: https://github.com/chlyNiklas/authjserror

Any help apreciated, thx <3

[chlyNiklas]

somehow it works on an other machine...