Open a saved Dimension file, make edits and then unable to undo edits.

CMND + Z and going to the dropdown menu won't revert the changes. This only happens in saved files, when I make a new document I'm able to undo changes but if I save > close > open for editing the undo function doesn't work.

This has happened before and I can't remember what I had to do to fix it. Can't cloud render as it says "error fetching credits" and it would seem that it's because I'm not logged in. But I am logged in to adobe CC but dimension 'helpfully' tells me "You're not logged in" but DOESN'T TELL ME HOW TO LOG IN TO DIMENSION. Thanks.

Open Adobe Dimension, click Help, Provide Feedback - the Feedback website opens; however, most of all of the menu items under each of the menus - File, Help...etc. are now greyed out and you must Quit Dimension and Restart in order to access menus like Import, What's New, Provide Feedback, Check for update...etc.

If I try to save a model into one of my own Creative Cloud Libraries the synchronization fails every time. The library 'exists' on the local machine, and is available / restores each time I run, but they do not sync between machines. I basically have two different libraries on two different machines.

when i use the dolly tool to zoom in, it cuts the objects in the lower half of the screen, it wasn't like that when i started this scene. how can i fix it so it will show the complete objects?

I am not getting any objects to appear in my scene panel, I have two custom 3D Models as well as two stock models in the scene. All are visible, editable and rendering in the preview window. However when I go to render there is no option to assuming because there are no objects being recognized for some reason. I have attached screenshots below. Not sure what is going on here.