Are you using the https://********.**.vuforia.io:8443/Thingworx/Composer/index.html or your personal ThingWorx instance.
ThingWorx Experience Server and ThingWorx are hosted by PTC and are already connected.
I am using http://188.8.131.52/Thingworx/Composer/index.html for the composer, so I guess that's my personal instance?
In thingworx studio settings the Default Experience Service URL is set to https://qwzpoqdd.studio-trial.thingworx.io/
Should I change it to something different?
Robert Pastor In your case, as you are a Trial user, by default the ThingWorx Studio is connected to the PTC hosted Experience Service and (PTC hosted) ThingWorx Platform. Technically, you are expected to get IoT data from the corresponding ThingWorx Platform (i.e., PTC hosted one) - to access your ThingWorx platform, visit https://xxxxxxx.studio-trial.thingworx.io:8443/Thingworx/
And from there, you can create entities to stream data into Studio. Well if you are specific about your personal instance, you can try 'Federation' to create a connection between personal and hosted ThingWorx platform.