This looks to be the Georgia version of Ed Meese’s Amicus brief to the Supreme Court then to the DC Appellate Court about Jack Smith not being properly appointed, but here under Georgia state law.
"As has been pointed out in prior filings, the special prosecutor’s oath of office was never filed. While this may have been an oversight, it may have been purposeful—a specific attempt to shield from public knowledge the fact that the special prosecutor had, in fact, been appointed without legal authority."