at first i seperated my folders in app.js into both folders

app
----(main)
----------login
----------profile
----dashboard
-------------page.js

which gets this error, in main there are many pages and i get this error. folder structure in main folder were something like this

app/(main)/profile/page.js

i removed (main) in app.js and transfer all folders in app.js directly, not in brackes (main) and edited like this

app/profile/page.js

the error gone