In my website there is a page which was giving server error after changes & deployment

- when i navigate to that page through navigation bar, the page is fine now
- but if i try to go directly to that link by typing the whole url it showing server error

here is some aditional info
1. next version 12
2. we are using ssr for the page
3. also there is a cache policy

res.setHeader(
    'Cache-Control',
    'public, s-maxage=600, stale-while-revalidate=300'
  )

please let me know if i need to be clear about anything else