Hi! Thank you so much for creating a ticket. I want to add some more details to make it easier for you.
During publishing, powerBI warns me that it'll take a while because the .pbix file is about 1GB. However, it never actually takes very long at all. It either resolves into the original screenshot or this one:
The current working online version's file size is 600 MB. The new one that I'm trying to upload is 1.1 GB. When inspecting the online version after attemping a publish, I can see many of the elements of the dashboard have the "Something is wrong with one or more fields" error. Only the elements using fields from tables I changed have broken. All the elements that use tables I didn't touch between versions are still working.
I hope this helps, thanks so much again!
Michael