today I encountered a very strange thing and can't seem to find a solution to this. Spine froze for a while when I copy + pasted keyframes and my rig exploded in one frame (other frames remained intact). Other than that one funny frame everything was fine though, Spine was just acting a bit strange after this so I restarted. After restarting the scene file doesn't show any bones or anything in the viewport, but everything is the in the outliner. I can also see my animations from the preview panel and even edit keyframes, but nothing shows in the viewport, Setup or Animation mode.
Tried with my laptop and the same thing occurs, and here it gets really weird. I'm working on v11 of the same file, and none of the earlier versions work either! Up to this point everything worked like a charm. Now even the older file versions display the same weird, empty screen (attached).
Also, if I first open any of these files and then open any other file from other projects they suffer from the same thing, nothing in the viewport. These other files open nicely if I open them before opening any of the v01-11 files. My current project is on the heavy side, it has quite a lot of images and three rigs but it has worked perfectly all the time, no hassle.
A workaround that seems to kinda work is that right after opening Spine I start a new project and import my latest project in. But I always have to do this when I start, so it's not a very good solution. Same problem occurs when I open the file that has the imported stuff in it.
I'm working on a commercial project with quite a tight deadline, so any help appreciated!
Using latest stable Spine (4.0.58)
Lenovo ThinkStation Tiny
Intel(R) Core(TM) i7-7700T CPU @ 2.90GHz 2.90 GHz
NVidia Quadro P600