Cant clear tray notifications

Is there anyway to clear these annoying red X from the notifications in linux?

This issue is persistent and related to a bug in sync with automatic pictures on my phone that was never resolved.

My setup info:
Server: Nextcloud 21.0.1

Operating System: Linux 5.4.0-65-generic x86_64
CPU: AMD EPYC 7282 16-Core Processor (4 cores)
Memory: 7.77 GB

PHP Version: 7.4.16

Desktop Client:
Nextcloud Desktop Client

Version 3.2.0 (KDE).
Linux Mint System: Kernel: 5.8.0-44-generic x86_64 bits: 64 compiler: N/A Desktop: Cinnamon 4.8.6 Distro: Linux Mint 20.1