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1. Update the parameter base.url in the XML config file (/var/lib/tomcat9/conf/Catalina/localhost/ROOT.xml), it should be https://your-mdm.com instead of http://your-mdm.com:8080. Restart Tomcat to apply changes:
service tomcat9 restart
2. Manually change URLs of all APKs.
2.1. Open the Applications tab, and uncheck the checkbox "Show system apps".
2.2. For each application, click the "Versions" icon
2.3. Update the URL(s) for the latest available version.