I had issues originally when I imported one of my workspaces to the MCreator 2019.5 version with my GUIs and I couldn't figure out how to fix it so I wound up deleting everything in relation to them. Now when I find myself wanting to re-add them I get this weird thing that happens that acts like I didn't click the save mod element button when I have. Unable to do anything else afterwards I simply close the mod element tab and it says the GUI mod element is in my workspace but when I goto compile or load test environment it comes up with an error about the GUI, and asks me to regenerate the code, when i tell it to go ahead it comes back with unable to import GUI mod element and asks me to skip importing it so i says yes and it removes the mod element completely. So essentially I'm unable to create GUIs in the current or I assume current version of MCreator 2019.5 as I don't see this having been fixed or addressed in the changelog. I originally ran it without internet in offline mode and then more recently with internet in online mode and still same issue. I've also ran it connected to a block and not connected to a block and still same issue.
Any help is much appreciated.
It should be noted I hadn't tried it without input slots before, but now I have, that one seems to work.