Taking Screenshot and Reading Immediately Issue

Hi guys -

I have a program that is taking a screenshot with Application.CaptureScreenshot and then trying to read the .png file produced to edit it and save it into something else. After I use CaptureScreenshot, I have a piece of code that looks like this:

 FileInfo fl = new FileInfo(filePath);
 
 if (fl.Exists || File.Exists(filePath))
 {
      fileData = File.ReadAllBytes(filePath);
      tex = new Texture2D(2, 2);
      tex.LoadImage(fileData);
 }
 else
 {
      print("Can't Load!");
 }

The "if" check fails 99% of the time in builds but never fails in the editor. I am 100% sure that the file exists that is stored in the variable "filePath." I've tried calling this code after a period of time, after I destroy the scene and reload it, and even after closing the game and restarting several times. I've tried editing the file path to include a reference starting at "C:/" and by looking for the file based on where the executable is. I've tried having the file path simply be the file name.

I think this has to do with my program not having permission to read the file because it's remaining locked after I capture the screenshot. Does anyone have an idea what might be going on and how I might fix it?