While waiting for Establishing TLS

Boa tarde,
Alguns computadores estão apresentando a mensagem abaixo ao realizar o login no Spark.

image

The most likely cause of this is network issues. Can the computers on which this problem occur reach the server that hosts Openfire?

I was having this same problem,

Can the computers on which this problem occur reach the server that hosts Openfire?

in my network, yes
I search in this forum solution for this bug,
I’m using spark 2.9.4
Openfire 4.6.4

Versão e Fabricante da JVM: 11.0.11 Ubuntu – OpenJDK 64-Bit Server VM
Servidor de Aplicação: jetty/9.4.35.v20201120