I don't know why but after the most recent site update all my character sheets customized assets from the themes to their character portraits appear blank on the page with my browser (Edge) is this an error only occurring with the Edge browser? and is there a way to fix this error?

This happens to a lot of people using Chromium based browsers.   I dont know if the cookies and assets just overwhelms them over time or what.   What's worked for me is clearing the cookies and cache specifically for DNDBeyond in the browser settings.

I cant find it now, but someone posted a browser cleaning setting that worked for a lot of people.  It is basically a cache issue though.

yup looks like that fixed it! the command is ctrl+shift+del to access clear cache with at least edge. just gonna post the full command here just in case its ever needed!

I'm experiencing the same problem right now, but the cache cleaning is not resolving it.

Here is how to delete all site data (this worked for me after trying cache clearing and the rating cookie, which sort of or didn't work)

https://www.dndbeyond.com/forums/d-d-beyond-general/bugs-support/142473-bug-uploaded-portraits-not-displaying?comment=2