502 Bad Gateway

[Ken Wright]

Maxim and anyone else who cares to chime in,

I'm still enough of a newbie that I have trouble understanding the error
logs.  The one for nginx reads the following at the end:

2019/08/12 22:48:51 [error] 8274#8274: *1 upstream sent too big header
while reading response header from upstream, client: 192.168.1.133,
server: _, request: "GET /nextcloud/index.php HTTP/1.1", upstream:
"fastcgi://unix:/var/run/php/php7.2-fpm.sock:", host: "192.168.1.101",
referrer: "http://192.168.1.101/nextcloud/"

I don't understand how to make the header smaller.  I really don't
understand what's going on; nginx says it's working, and php shows the
phpinfo page, but when I actually try to run an application nothing works!

Ken

-- 
Registered Linux user #483005

If you ever think international relations make sense, remember this:  
because a Serb shot an Austrian in Bosnia, Germany invaded Belgium.