Intellij showing errors after trying to build, and red lines underneath files in list, but after clicking on file no errors display

Question

So I'm having a really odd issue with intellij today. When I try to build my project, it's loaded with errors, basically all of them of the "java: cannot find symbol" in import statements. I see all the red lines underneath file names in the project hierarchy.

But when I actually open those files, no errors are displayed, and after a few seconds the red line underneath the file disappears as if there are no errors. Of course, I still can not run my project since on an attempted build/run it'll complain about those phantom errors. I have no idea what to do at this point.