These directories are for SAS sessions, I suspect ones from 2020 and 2021 are no longer valid. Are there any recent ones? Does it seem to be specific users?
Based on this SAS Note it looks like tklauncher normally removes them, so maybe it 's the permissions issue described in the note:
2021-04-28T11:01:11,502 INFO [00000031] App.tk.launcher.process.output (tklauncher.c:3899) - SAS Launcher: [FFEC7B0D-5753-E844-B953-7C45D6A9913D] rm: cannot remove ‘/opt/sas/viya/config/var/spool/compsrv/default/08111c70-7dd3-4e21-b823-4e78044633cf’: Permission denied
Problem Note 65881: The error "Compute server failed with the exit code 1" occurs in SAS® Studio V
https://support.sas.com/kb/65/881.html
--
Greg Wootton | Principal Systems Technical Support Engineer