Mod Elements Not Showing (Still no Answer)

HELP!

For some reason, when I make a new Mod Element it doesnt show up, nor can I test my mod in minecraft. It all started after I tried to make a Fluid and now it just doesn't work at all, I have tried restarting MCreator, I have tried deleting all the mod elements, but still nothing.

I keep trying to make a block, but when ever I finnish making it, it doesn't show up in Mod Elements, but, I know its there, cause when I try making the block again, and use the same name, the name turns red, indicating that there is already a Mod Element that has that name.

All help will be apreciated!