Created attachment 840084 [details]
sudo journalctl -a contents

Hello, 

After I did some maintenance for R on the next boot Plasma does not start .
It seems that other components were part of that maintenance .
Everything works as before except that the Plasma does not start ,
After login all applications defined in start automation work with out any 
problems .  The operational status of KDE is very limited .  
I was able to get a full journalctl -a immediately after a new boot .
It is attached ..... journalctl_a_27-07-2020_Plasma_does_not_start.txt 

Could you please have a look at this issue ?

Please let me know if you need any additional information .

Thank you, 

Regards,

Nick