I am experiencing a similar issue. The character select screen is black, but I can still pick a character.
For my character in space, all of the UI windows are invisible. I can resize them and I can interact with them(like warping with the overview), but I can’t see them. The same goes for the escape menu, so I can’t try clearing the cache. I can see and interact with the 3d environment. My character in a station has similar issues, no UI and can’t undock.
I found a few things that may help. In the logs (loglite utility in the launcher), I get “Failed to get a valid ballpark in time after trying 30 times”, which has been an issue in the past for people but seemed to be a server issue, I’m not sure if its related this time. Also, the network diagnostic tool can resolve the IP addresses for *.eveonline.com, but every request times out. Though, I can’t imagine this is an issue since I can login to the launcher, plus I’m not sure how this would affect the UI.
I’m not sure when it started since I have been away from eve for several months. I’m running this on arch with lutris.