I believe your copy of Arduino is probably ok. This error (probably) means something is wrong with the code you're trying to compile. It could also mean something is messed up with your PC's temporary folder or permissions, but before you dive down that deep rabbit hole, let's first look at the code you're trying to compile. That's most likely the problem.
My guess is you didn't write this program. Maybe it came from here?
https://github.com/profezzorn/ProffieOS
Perhaps you copied and pasted only the contents of "lightsaber.ino" into the Arduino window? Then you clicked Verify? This is important, we need to know what you actually did to get to the bottom of this error!
With normal, simple single-file Arduino programs you can indeed just copy them into the Arduino window.
But this program isn't a small & simple program. It needs many other files, and they need to be in sub-folders with specific names. You can't get that arrangement by just copying and pasting text. You need to actually download the whole "ProffieOS" repository from github. You're supposed to click the green "Clone or download" button on that page. If you don't have the special github software on your PC (which is very unlikely if you're using Windows and you're not a software developer), you would click the "Download ZIP" link.
When you save the download, remember *where* you're saving it. You'll need to know its location for the next steps, so don't just instantly click OK. If the location isn't somewhere convenient, you can move it after the download completes.
The ZIP file will give you everything you need, but there's still a couple more steps you must do correctly. First extract the ZIP file. You will very likely end up with a folder called "ProffieOS-master", with "lightsaber.ino" and the 11 sub-folders shown on the github page. You need to rename this top folder to "lightsaber", because Arduino expects the main folder to have the same name as the main .ino file.
After you've done all this, then use File > Open in Arduino. You'll probably need to navigate in the open dialog to whereever you extracted the ZIP file and renamed its folder.