- Bluetooth cannot start
- Unable to shut down normally
- Plank docking program cannot be used normally
- A group of widgets cannot be used
- A number of login interface themes cannot be used
Hi and welcome,
Please explain what you mean.
With logs if possible.
System information may be a good beginning;
inxi -Farz
Also here is a helpful guide that will also include how to format code etc;
Sounds as if these things are not compatible with plasma6.
Not only should you disable and/or remove any addons (widgets, themes, etc) that have not been updated for plasma 6, but it is also extremely advisable that you ‘refresh’ your desktop by clearing the configs and cache.