I do not know the significance of error 29.
Until Android 13 (T) many users had difficulty with the exact oxygen version with which to prepare the device. At one point Post # 59 I mention the possibility of contamination caused by the wrong bits of “mixed” Android version (or firmware revisions) existing on the device. I am guessing that the “mismatch in the zip” reported in the error is loosely speaking due to this sort of problem.
The big selling point for T is that one gets to flash a whole matching build – that is to say that one is far less dependent on the pre-existing stock ROM as long as it is fully updated — as I demonstrated explaining about vendor parts Post # 65.
With a correction of a typo: