@mutten
Hi there,
As for the ads: there is an issue with the adplayer on the webversion. It's being worked on.
As for the interest: interest is placed on your Savings and not on your balance. So if you have your Club Funds on Savings during match simulation, you should have the 2% interest added to that total amount after your match has been played.
As for selling players: the more expensive players are much more difficult to sell and might take a lot of time before they get sold.
As for the other issues: can you give us some more info on the error message you receive? And what message do you get when you try to login on the OSM app?