paper trail nao está encontrando o servidor spring e fica em modo de "Aguardando"

Srs, Bom dia! Fiz todo o processo de configuração do Papertrail conforme a aula e no Setup Logging, não encontra minha máquina fica em "Waiting for first log sender. No logs received yet…". Poderiam me ajudar? Segue código do logback.xml.

<?xml version="1.0" encoding="UTF-8"?>
<configuration>
    <include
        resource="org/springframework/boot/logging/logback/defaults.xml" />
    <appender name="PAPERTRAIL"
        class="ch.qos.logback.classic.net.SyslogAppender">
        <syslogHost>logs.papertrailapp.com</syslogHost>
        <port>52515</port>
        <facility>USER</facility>
        <suffixPattern>my-app: %logger %msg</suffixPattern>
    </appender>
    <appender name="STDOUT"
        class="ch.qos.logback.core.ConsoleAppender">
        <encoder>
            <pattern>%clr(%d{yyyy-MM-dd HH:mm:ss.SSS}){faint}
                %clr(${LOG_LEVEL_PATTERN:-%5p}) %clr(${PID:- }){magenta}
                %clr(---){faint} %clr([%15.15t]){faint}
                %clr(%-40.40logger{39}){cyan} %clr(:){faint}
                %m%n${LOG_EXCEPTION_CONVERSION_WORD:-%wEx}
            </pattern>
        </encoder>
    </appender>
    <root level="DEBUG">
        <appender-ref ref="STDOUT" />
        <appender-ref ref="PAPERTRAIL" />
    </root>
</configuration>