Everything works fine on the editor but when compiled to an android device the form doesn't open. I could've sworn it opened before. Now it seems like it can't create a screenshot. Any tips?

Found the error. 

It should be ScreenCapture.CaptureScreenshot(filename);

not ScreenCapture.CaptureScreenshot(screenshotPath);

because "On mobile platforms the filename is appended to the persistent data path."

https://docs.unity3d.com/2017.1/Documentation/ScriptReference/ScreenCapture.Capt...

Sorry for the delayed response! It seems I forgot to add the UNITY_ANDROID check for mobile platforms. I see UNITY_IOS there, but not Android. Whoops, sorry about that! I'll get  that patched in with the next update. 

Thanks for bringing this to my attention, and replying with your solution!