When I do double click on scheduler to create a new event it didn’t apear on screen, but when I click somewhere of windows, displays a popup that says that my changes will not save if I press Ok button. If I press Ok, didn’t happen, but if I press Cancel button, popup desapears and event apear on screen to edit there.
Do you have some custom css on the page? Lightbox position itself absolutely over scheduler, which works fine for majority of cases, but it is possible that custom styles affect position or z-index of lightbox