Have had this error come up a few times in the last couple of weeks:
When opening up a vMix preset, I get some sort of GUI error message as it's loading (sorry I will do a screen capture next time!). The preset loads but any of the vMix calls inputs that were in the GUI error message completely disappear! If I logout and open up the preset again, it all comes back, but wondering why this may be happening now as I do a lot of multi-presets during an event!!

Thanks!
John