(Connection refused) while connecting to upstream, client

[kaiminator]

Cheers,

recently, the fever plugin does not work anymore:

Env:

ttrs as armv7 docker container (image: nventiveux/ttrss-arm32v6:master)
macvlan network with class c address
traefik as reverse proxy

Worked all since years but a recent update broke this.

Got an error 500 error in the nginx access log

10.10.200.4 - - [22/Apr/2024:11:04:21 +0000] "POST /plugins.local/fever/?api HTTP/1.1" 500 5 "-" "Reeder/4020.89.01 CFNetwork/1494.0.7 Darwin/23.4.0" "192.168.1.150"

end on the error.log

024/04/22 11:09:10 [error] 17#17: *14 connect() failed (111: Connection refused) while connecting to upstream, client: 10.10.200.4, server: , request: "POST /backend.php HTTP/1.1", upstream: "fastcgi://[::1]:9000", host: "$my_fqdn" 2024/04/22 11:09:10 [warn] 17#17: *14 upstream server temporarily disabled while connecting to upstream, client: 10.10.200.4, server: , request: "POST /backend.php HTTP/1.1", upstream: "fastcgi://[::1]:9000", host: "$my_fqdn" 2024/04/22 11:09:41 [error] 17#17: *45 FastCGI sent in stderr: "PHP message: PHP Fatal error: Uncaught Error: Failed opening required 'classes/Db.php' (include_path='/srv/ttrss/plugins.local/fever:/srv/ttrss:/srv/ttrss/include:.:/usr/share/php8') in /srv/ttrss/plugins.local/fever/index.php:36 Stack trace: #0 {main} thrown in /srv/ttrss/plugins.local/fever/index.php on line 36" while reading response header from upstream, client: 10.10.200.4, server: , request: "POST /plugins.local/fever/?api HTTP/1.1", upstream: "fastcgi://127.0.0.1:9000", host: "$my_fqdn"

any idea?