Typically a continuous 503 error when attempting to access your Servlet application that is installed and bundled with your Android apk file, means that the Jetty Servlet container of the SmartSDK in not initializing correctly. Try the following:
Login as device admin
1. User Tools -> Screen Features -> Screen Device Settings -> Initialize Screen Features Settings
2. Press OK to initialize SOP.
Performing this operation initializes the configuration changes under "Screen Features"; allowing the Jetty Servlet container to reinitialize itself and clear any existing configuration files that may be corrupted or incomplete.
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