As a workaround you can modify the first serverPort variable in server.js from 0 to another port number (e.g. 59540) located in <install directory>\Wappler\resources\app\Shared\DMXzone\dmxAppCreator\UI\server.js
I’m not sure what issues this will cause if you’re working on multiple projects and switching between them, but it appears to work between one Server project and Capacitor mobile project.