I can't edit and delete themes
I've installed wpForo in 3 languages: English, Spanish and Ukrainian. A few days ago I've detected that it isn't possible to edit and delete themes in Spanish and English, but in Ukrainian isn't such a problem.
I've uninstalled the Spanish forum and installed it ones again, but it not helped. I've coppied all js-files from Ukrainian version into Spanish, but it not helped either. And I cleared the cach every time. I don't understand what's the matter. Please, tell me, how I can solve this problem.
I add two screencasts for see the difference: the forum in Ukrainian works well, en in English not well.
Besides of that, there is another problem: when I try to create new theme, a message appears asking: do you want to leave the page or not? and saying that I may lost the information if I leave it. In Ukrainian forum don't appear such a message.