khangji

So today i was making a animation for my youtube channel and i needed some particles to finish it off. when i clicked on it, suddenly i got a Error message And i dont know why. and i clicked on the "X" and it closed my mine-imator. and when i reopened it all my progress is totally gone and im really upset about this bc i spended HOURS on this and now its all gone.. Someone pls help me fix this And this is the Error msg i got: Invalid id -4 in CppProject::Asset::Find:71 Version: 2.0.0 (Windows 10 Version 2009)