I'll try to manually update then. I've installed Magisk cause it's the only way I've found to get all the cameras to work.That shows me, that you seem to have "replaced" the default.prop file via Magisk (either itself or through a module).
This property controls the download location for the updater app, if a different location than default LineageOS is used (like in my ROM).
As manually updating also works, I recommend you to go that path, as you need your specific Magisk setup.
Thank you;