I downloaded it and checked. It shows me this:
View attachment 70318 View attachment 70319 View attachment 70320
I guess that says, that it is Frankenfirmware.
Also, I wanted to do what you said, got the 9.2 Update-Files and tried to downgrade with SysUpdater, but it showed me the same error with "Failed to get CIA Info".
Then I tried with SafeSysUpdater. I started it and checked the files and it showed me that the MD5 Number is not the same.
How can this be possible, I'm 100% sure that these are the right files.
Thanks