Hi, We used koha in version 19.11.09.000, when upgrading to version 19.11.14.000 we see a performance difference when running resources. The screen with the message often appears: Proxy Error. The proxy server received an invalid response from an upstream server. The proxy server could not handle the request. Reason: Error reading from remote server. Has anyone been through this situation? Do you know how to guide me? Server information: OS version ('uname -a'): Linux koha 3.16.0-9-amd64 #1 SMP Debian 3.16.68-2 (2019-06-17) x86_64 Perl version: 5.020002 Versão do MYSQL: mysql Ver 15.1 Distrib 10.1.32-MariaDB, for debian-linux-gnu (x86_64) using readline 5.2 Versão do apache: Server version: Apache/2.4.10 (Debian) PSGI: Plack (deployment) Memcached Servidores: 127.0.0.1:11211 | Namespace: koha_biblio | Situação: em execução. | Configuração lida de: koha-conf.xml Versão do Zebra: Zebra 2.0.59 (C) 1994-2014 Tks, José Ricardo Quaglio Informatização de Bibliotecas - SC.211.3 Secretaria de Cultura / Município de São Bernardo do Campo Tel.: (11) 2630-9394