I'm using kde plasma, all for a sudden after restart I'm getting below error and booting the device in Gnome. Even I'm unable to connect the wifi.
I tried timeshift and restore the system to previous version no help. I removed the power from laptop its booting with help of battery.
My current kernal is 5.4.6-2 linux54
Error: the current theme can't be loaded due to the error below please select another theme
type battery unavailable
I'm have installed and using KDE plasma, because of the error the OS switched automatically to Gnome. I'm not getting options for switch back to KDE and after logging inside its a Gnome GUI. As mentioned earlier I tried Timeshift to previous date it didn't fixed/worked. I searched the community I didn't find and specific post on this issue.
I'm clueless whats happening to my OS.
Dude, you uninstalled pretty much your entire desktop environment, I'd call that a major change!
Look at my above post, see all those 'removed' lines? That's KDE. I can't tell what the transaction was you started because you was using pamac, and because you're not telling me.
There is no mention of Gnome in the logs you posted except for a couple of gtk utilities so either it isn't installed or you installed it at an earlier date. If you had a functional desktop when you started this thread there must have been something there but I can only make guesses based on the limited information you've provided.
Best guess, you installed conky and conky manager and for whatever reason pulled in
Along with it.
You then uninstalled conky/manager and the plasma-sdk and it took everything else with it.
The solution is to reinstall the packages you removed
I guess you've already reinstalled but I'll give you one last bit of advice. When you uninstall any application, it will often remove the dependencies as well. In the case of a stock application, ie the ones that were there when you installed your os, you're liable to remove core parts of the system resulting in situations like this. Keep that in mind when removing software in the future.
Hopefully you learn something from this, It's certainly been educational for me!