Great! I checked few maps, all works correct.
However, some large maps at me does not open. As well this map:
Thanks for the SEC file and the error message. I was able to track down the problem, looks like there's a bug in JavaFX which leads to this error if the width or height of the window is > 8192 pixels. Just reported the bug, hopefully it will be fixed soon.
In the meanwhile try to keep the total width and height below 8192.
total width = map width + offset * 2
if you zoom in, the total width is multiplied by 1.5