Latest questions about "island experiment"

I have downloaded Island Experiment on my Android Samsung and my Samsung tablet, they are not synced at levels; why and how can this be fixed pleased?

I have a problem with the Island Experiment game. Yesterday, I downloaded the new version and now it doesn't load. It stays at 0%. What can I do?

The quest "Go to Weiss and buy audio batteries" is bugged: when I go to Weiss I can't click on him, the blue arrow is missing so the quest is not reachable and it is still awaiting.