While I'm trying to access any of the org-agenda options or commands! I always get this error
Symbol’s value as variable is void: org-priority-highest
and the list shows nothing even though I've set
The current name for the highest priority value is
org-highest-priority instead of
org-priority-highest. They changed the names in January 2020 in this commit. An alias was added for the old name, but there was a bug in the way it was done.
This bug appears to be in 9.3.6 and fixed in 9.3.7. Try updating your