Hello, I think I need assistance because I got same problem and errors and did the things suggested here like clearing caches, trying another browser etc. Unfortunately problem still persist.
I'm also facing the same issue when updating my portfolio. When I click on publish I get this error at the top of the page. I tried to clear cache and cookies and tried another browser but the error is still appearing.
I want to upload my portfolio and when i click on "publish" it says : "Sorry, something went wrong. Please try again later." I deleted cookies and cache and its still same problem.