502 error with SvelteKit SSR and caprover

[autoklasa]

I have weird error with SvelteKit setup on caprover, when I enable SSR and only in production. One of pages (which loads big components server side) throws 502 only on hard refresh.

Thanks to awesome caprover community I found how to trace logs of my applications and nginx containers and I was able to pin point that above mentioned reqests results in this entry in nginx log upstream sent too big header while reading response header from upstream can you advice on how to fix this and which config file would be the best to make modifications?

This is only config i found that is supposed to "fix" this kind of issue:

~/.config/valet/Nginx/all.conf
proxy_buffer_size   128k;
proxy_buffers   4 256k;
proxy_busy_buffers_size   256k;
fastcgi_buffers 16 16k;
fastcgi_buffer_size 32k;
fastcgi_busy_buffers_size 32k;

any advice would be highly apreciated <3

[autoklasa]

I have calculated header size to be 4k - it is response link headers.
and have added this: proxy_buffer_size 16k; to app nginx config

caprover+sveltekit KING
<3

[Antoine-lb]

More info on this issue: sveltejs/kit#11084