UI buttons are invisible but clickable when built

I have the same problem but mine lets me build the game for mobile but it will randomly make certain UI elements invisible but still clickable where they are supposed to be Some of my buttons that are placed in a Canvas set to World Space don't show up but they are still clickable and intractable.I know their position is anchored well they are just not being rendered. They are all also set to UI layer and the camera is set to render UI. However, some objects show up and some don't. I didn't really change anything before building the game to test on iOS. Because it used to work just fine until it decided to act this way. To illustrate my problem, I have uploaded a video on youtube to show how it's all fine in the editor but once built, some of the UI objects disappear but still clickable and intractable! You will notice how when the sprite that was set to show when a button is pressed, is shown when I click the invisible button but then disappears as I let go of the button. UPDATE: I noticed I keep getting this error which I think ought to be the main issue: Error: Could not extract GUID in text file Assets/Scenes/AlchemistHouse.unity at line 28923. Unfortunately, it's not just that line its 88 more lines right below it ! so 89 GUID aren't being extracted ?!! Youtube link here: https://www.youtube.com/watch?v=QWPXYijXtsc Problem randomly started happening after 2018.1+