There’s lots of SQL, and SQL needs a database (which doesn’t imply it needs a --dbpath).
You can sometimes set --console-log-level=information to see commands that work.
find says
The operation List has started
No local database, accessing remote store
compare says
The operation ListChanges has started
No local database, accessing remote store
delete and compact complain about the missing database, either my --dbpath one or implied one,
as recorded for that destination in C:\Users\<user>\Local\AppData\Duplicati\dbconfig.json.
We’ve been waiting several days for @Ralf to get some information back about the run environment which might save us from having to guess how situations arose, e.g. why is it in the SYSTEM profile?
GUI Commandline in a Windows service install might do that, and deleting a job can delete database.
See image above of Delete screen for a backup. Was that used with Delete the local database?
is very vague. Maybe all steps aren’t recalled, but I’m just asking for general info, including state now.
The more that can be said, the better, otherwise the answers can’t be tailored around known situation.