Clients on all devices show last update time, but no positioning on the demo ser

Hi Anton,
testing your great product on demo.traccar.org with your android and ios clients.
I managed to link them to the platform and now see last updatetime for all my devices ( on demo.traccar.org) but
CAN'T see any positioning.

I have 2 versions of android 6 and 5.1 and an ios device with last software version.
I use both mobile data and wifi connection on them to be sure no traffic limits are in place.

Is there anything wrong I'm doing ?

Check browser developer console to see if there are any errors there.

Thank you, somehow it appears this evening.
I openned the traccar manager app on android and saw them positioned, all of them, also in the demo.traccar.org server.

Thank you !