Please have a look in lompsa dektop version in the menu "Settings / Developer Console" or something named similar.
If there are client errors they should be listed there.
In Finnnish it's probably somethings like: "Settingsäää / Develööperää Cönsölylölaaä"
Please let me know if my Finnish is improving.
But all joking aside.
There should be output when you press Start button, please if you can see if there is anything in the developer console accessible from the top settings menu