upstream sent too big header while reading response header from upstream

valet-nginx-fix

I was getting this error just now when trying to perform a POST. In my ngnix-error.log I'm seeing this error:

    upstream sent too big header while reading response header from upstream

I was able to fix by adding these two lines to my valet.conf file in the location `/usr/local/etc/nginx/valet/valet.conf`:

    fastcgi_buffers 16 16k;
    fastcgi_buffer_size 32k;
    
 

I also tested this POST request with less form fields and it seems to be consistent with the amount of data being submitted.


Another solution: https://github.com/laravel/valet/issues/290

And then restart everything:

     brew services restart nginx && valet restart