I can't really understand this situation.. I tried on so many platfrorms still working without problem... I also opened a demo account (ECN) with TickMill and things seems to be fine (look at the picture) try to login to this account and try it once ...
CreateButton error is not an issue, will fix this bug next update but, "trade operations not allowed by settings" is because you should allow Live trading while attaching the EA on a look at the screenshot below