had the same problem. I’ve fixed it by refreshing the design of the local domadmin.nsf with a template vers.9.
Unfortunately the current version of the domadmin.ntf is not copied automatically to the data-directory specified in the notes.ini, so you need to find the original installation path and then copy it to your data-directory.
If a design refresh doesn’t work, try a design replacement.
Yes, I always keep my Notes data in d:\data\notes.
I always keep my Notes data (indeed all my data) on a physically separate drive separate from the operating system, so that when Windows crashes and burns bad as it variably does from time to time over the years, I have that one more source of backup and security by having the data separate.