I reboot the server and see some issues when entering into the xwiki. But I see the wiki theme disappear , below is the screenshot:
`root@iZgw887xhzjvyiz9di8qtmZ:~# service tomcat9 status
● tomcat9.service - Apache Tomcat 9 Web Application Server
Loaded: loaded (/lib/systemd/system/tomcat9.service; enabled; vendor preset: enabled)
Drop-In: /etc/systemd/system/tomcat9.service.d
└─xwiki-tomcat9-systemd.conf
Active: active (running) since Fri 2022-05-20 15:11:36 CST; 5min ago
Docs: Apache Tomcat 9 (9.0.63) - Documentation Index
Process: 532 ExecStartPre=/usr/libexec/tomcat9/tomcat-update-policy.sh (code=exited, status=0/SUCCESS)
Main PID: 583 (java)
Tasks: 86 (limit: 9053)
Memory: 1.0G
CGroup: /system.slice/tomcat9.service
└─583 /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Djava.util.logging.config.file=/var/lib/tomcat9/conf/logging.properties -Djava.util.logging.manager=org.apache.juli.ClassLoaderLogManager →
May 20 15:16:43 iZgw887xhzjvyiz9di8qtmZ tomcat9[583]: 2022-05-20 15:16:43,625 [XWiki Solr index thread] WARN c.x.x.XWiki - Invalid locale [zh__#Hans] listed as available in the prefer>
May 20 15:16:43 iZgw887xhzjvyiz9di8qtmZ tomcat9[583]: 2022-05-20 15:16:43,631 [XWiki Solr index thread] WARN c.x.x.XWiki - Invalid locale [zh__#Hans] listed as available in the prefer>
May 20 15:16:43 iZgw887xhzjvyiz9di8qtmZ tomcat9[583]: 2022-05-20 15:16:43,638 [XWiki Solr index thread] WARN c.x.x.XWiki - Invalid locale [zh__#Hans] listed as available in the prefer>
May 20 15:16:43 iZgw887xhzjvyiz9di8qtmZ tomcat9[583]: 2022-05-20 15:16:43,751 [XWiki Solr index thread] WARN c.x.x.XWiki - Invalid locale [zh__#Hans] listed as available in the prefer>
May 20 15:16:43 iZgw887xhzjvyiz9di8qtmZ tomcat9[583]: 2022-05-20 15:16:43,760 [XWiki Solr index thread] WARN c.x.x.XWiki - Invalid locale [zh__#Hans] listed as available in the prefer>
May 20 15:16:43 iZgw887xhzjvyiz9di8qtmZ tomcat9[583]: 2022-05-20 15:16:43,773 [XWiki Solr index thread] WARN c.x.x.XWiki - Invalid locale [zh__#Hans] listed as available in the prefer>
May 20 15:16:43 iZgw887xhzjvyiz9di8qtmZ tomcat9[583]: 2022-05-20 15:16:43,779 [XWiki Solr index thread] WARN c.x.x.XWiki - Invalid locale [zh__#Hans] listed as available in the prefer>
May 20 15:16:43 iZgw887xhzjvyiz9di8qtmZ tomcat9[583]: 2022-05-20 15:16:43,787 [XWiki Solr index thread] WARN c.x.x.XWiki - Invalid locale [zh__#Hans] listed as available in the prefer>
May 20 15:16:43 iZgw887xhzjvyiz9di8qtmZ tomcat9[583]: 2022-05-20 15:16:43,795 [XWiki Solr index thread] WARN c.x.x.XWiki - Invalid locale [zh__#Hans] listed as available in the prefer>
May 20 15:16:43 iZgw887xhzjvyiz9di8qtmZ tomcat9[583]: 2022-05-20 15:16:43,804 [XWiki Solr index thread] WARN c.x.x.XWiki - Invalid locale [zh__#Hans] listed as available in the prefer>
lines 1-23/23 (END)
`
What could be wrong? I install with xwiki-tomcat9-mysql - XWiki Tomcat 9/MySQL based package