Support intro
Sorry to hear you’re facing problems 
help.nextcloud.com is for home/non-enterprise users. If you’re running a business, paid support can be accessed via portal.nextcloud.com where we can ensure your business keeps running smoothly.
In order to help you as quickly as possible, before clicking Create Topic please provide as much of the below as you can. Feel free to use a pastebin service for logs, otherwise either indent short log examples with four spaces:
example
Or for longer, use three backticks above and below the code snippet:
longer
example
here
Some or all of the below information will be requested if it isn’t supplied; for fastest response please provide as much as you can 
Nextcloud version (eg, 29.0.5): 30.0.1
Operating system and version (eg, Ubuntu 24.04): Archlinux 6.11.4-arch2-1
Apache or nginx version (eg, Apache 2.4.25): Apache 2.4.62
PHP version (eg, 8.3): 8.2.24
The issue you are facing:
In the new Nextcloud 30 UI, when you mouseover (hover) over the menu icon to open the menu (top-right), a white-ring of pixels appears around the avatar. This is in the dark theme (it looks like they either were not themed for the dark theme, or this was just missed)
Is this the first time you’ve seen this error? (Y/N): Y
Steps to replicate it:
- Login to Nextcloud
- Mouseover (hover) over the Avatar (menu icon) at top-right
- Watch the white ring of pixels appear around the Avatar
The output of your Nextcloud log in Admin > Logging:
NOTE: the ability to view individual messages by clicking the ellipse ... at the right side of each error is broken in Nextcloud 30.
None Relevant - see only repeating error in nextcloud.log below
The output of your config.php file in /path/to/nextcloud (make sure you remove any identifiable information!):
None Relevant
The output of your Apache/nginx/system log in /var/log/____:
None
Output errors in nextcloud.log in /var/www/ or as admin user in top right menu, filtering for errors. Use a pastebin service if necessary.
Only error is:
{"reqId":"ehczgp8570NrV3CajHsh","level":3,"time":"2024-10-22T20:58:05+00:00","remoteAddr":"192.168.6.104","user":"david","app":"PHP","method":"GET","url":"/nextcloud/apps/theming/icon/settings?v=ffcbc457","message":"Module \"bcmath\" is already loaded at Unknown#0","userAgent":"Mozilla/5.0 (X11; Linux x86_64; rv:131.0) Gecko/20100101 Firefox/131.0","version":"30.0.1.2","data":{"app":"PHP"}}